Questions on Algebra: Trigonometry answered by real tutors!

Tutors Answer Your Questions about Trigonometry-basics (FREE)

Question 375467: tan (5 pi/6) - cos 9pi/4 without using a calculator

Click here to see answer by nyc_function(2733)

Question 376016: 1. Determine the solutions for 2tan^2x-3secx=0 in the interval x belongd to
(-2pie, 2pie).
2. Graph the function y=-2cos(4(x+2pie/3)-3
3. Graph y=3sin(2(x+5pie/6)+1
Click here to see answer by Alan3354(30993)

Question 376078: Pls help! If you can answer either one of them, I am so appreciated.

2. If polynomial p(x)=2x^3 -3x^2-10 has exactly one real zero r, -1<=r<=1, which following is true: A. -1<0 B. 0<1 or C.other answer?
3. what is a portion of graph of y= y|-|-x|| ? graph it.
4. what's X if 3x^2-2+7=0 then (x- 1/3)^2= ?
5. If y=b^x and b>1, which one is true: A log y b=x. B. log b x=y. C. other answer.
6. The radian measure of angle containing x degree is: A.Pi x/180 B. Pi x/ 180. C. other answer
7.If f(x)= x^2, when x>0 and c>1, then f(x^c)= ?
8 2log10x-log10y=?
9.for X# 0, if f(x)3x^2 and g(x)=1/2, then f(g(x))= ?
10 3+i/2-i = ?
11. If cotx^0=1, then x=?
12. Y=x+1 and x.y=2 so what x?
13. where can you defined tan X=?
14. If f(x)=3-2x and f^-1 denotes the inverse of f, then f^-1(o) is ?
15. What is the solution set of 2sin^2(x)-3sin(x)-2=0 where 0<=x<=2pi
Click here to see answer by Fombitz(13828)

Question 376215: Can you please help me! Thanks
As θ increases from π to 3/2π, which statement is true?
a)cos θ increases from -1 to 0
b)sin θ increases from -1 to 0
c)sin θ decreases from 1 to 0
d)cos θ decreases from 1 to 0
Thanks
Click here to see answer by ewatrrr(10682)

Question 376212: Can you please help me! Thanks
The graph of which equation has the same amplitude as the graph of the equation y = 2 cos x
A) y = 2 sin x
B) y = ½ cos 2x
C) y = sin 2x
D) y = 2 tan x
Thanks
Click here to see answer by Fombitz(13828)

Question 376402: hi could you please help me to verify this identity

(cot^3 x - tan^3 x)/(sec^2x + cot^2x) = 2cot(2x)
Click here to see answer by jsmallt9(3296)

Question 376374: θ=50 degrees, find the reference angle
Click here to see answer by jsmallt9(3296)

Question 376518: 2 cos squared (75degrees)-1

Click here to see answer by jsmallt9(3296)

Question 377231: if a wheel has a diameter of 24 inches and is traveling at 60 mph, what is the rpm?
Click here to see answer by Alan3354(30993)

Question 377716: How do I convert (-1, 5pie/2) to rectangular coordinates?
I got it narrowed down to (1,0) or (0, -1) but I am confused still.
Click here to see answer by robertb(4012)

Question 377711: How do I convert (3 square root 3, -3) to polar coordinates?
Is it 6, 5/6 pie or -3, 1/3 pie?
I might be totally off?
Click here to see answer by Fombitz(13828)

Question 377727: When z = -2 -2i square root 3 what is its "trigonometric form?"
2 (cos pi/6 + insi pi/6) is what I got.
Click here to see answer by Alan3354(30993)

Question 377821: 1. if cotx^0=1, then x=?
2. y=x+1 and xy=2 so what x?
3. where defined tanx=?
Click here to see answer by Alan3354(30993)

Question 377998: Find the solutions for 2sin^2(2x)+5sin(2x)-3=0
Click here to see answer by richard1234(5390)

Question 378096: I need to find the 6 trigonometric functions for this problem. The hypotenuse 16 an the adjacent is 12. I need the Cosine, Sine, Tangent, Secant, Cosecant, and Cotangent???
Click here to see answer by nyc_function(2733)

Question 378202: Find all solutions to
tan(x/2)=sqrt3
Click here to see answer by Alan3354(30993)

Question 378203: Find all the solutions between 0 and 2pi to the equation
cos(2x)=sin(x)+1
Click here to see answer by ewatrrr(10682)

Question 378269: what does the graph of f(x)=(x^2+4x-5)/(x^2+8x+15) look like?
Click here to see answer by Fombitz(13828)

Question 378286: what does the graph of ((2x^3-1)/(5x^3-16)) look like?
Click here to see answer by Fombitz(13828)

Question 378302: Hey, I'm trying to prove this sin(u+v)=sin(u)cos(v)+cos(u)sin(v) and I have no idea how. Thanks :)
Click here to see answer by Edwin McCravy(8909)

Question 378547: what is g^-1(x) if g(x)= 2/x +1
Click here to see answer by solver91311(16885)

Question 378583: ln(x)-3 ln(x-1)
Click here to see answer by rapaljer(4667)

Question 378583: ln(x)-3 ln(x-1)
Click here to see answer by stanbon(57352)

Question 378604: log4 z+log4 y
Click here to see answer by stanbon(57352)

Question 378725: I need help with a word problem, please! I just can't seem to get the hang of how to do this problem, it seems to be too wordy.
A pole 80 feet tall is situated at the bottom of a hill that slopes up at an angle of 12.0 degrees. A guy wire from the top of the pole to the hillside forms an angle of 35 degrees with the top of the pole. Find the distance from the base of the pole to the guy wire's point of attachment.
Thank you so much!
Click here to see answer by scott8148(6628)

Question 378975: given sin(theta)= -1/5 and tan(theta)< 0, find the exact value of cos(theta)
Click here to see answer by richard1234(5390)

Question 379057: FIND THE EXACT VALUES WHEN ANGLE = 11pi/6 . DRAW ANGLE ON A UNIT CIRCLE?
Click here to see answer by ewatrrr(10682)

Question 379057: FIND THE EXACT VALUES WHEN ANGLE = 11pi/6 . DRAW ANGLE ON A UNIT CIRCLE?
Click here to see answer by stanbon(57352)

Question 379059: SKETCH A GRAPH OF Y= -3 cos2x, 0 solid < x solid < 2pi. LABEL BOTH AXES FULLY. GIVE THE AMPLITUDE AND PERIOD.
Click here to see answer by Fombitz(13828)

Question 379130: Please help I've tried to do it, but I don't know if I'm doing it right.
Simplify the expression using one term, sin(alpha-beta)cos beta+cos(alpha-beta)sinbeta
Click here to see answer by jsmallt9(3296)

Question 379228: -15=5b
Click here to see answer by rfer(12660)

Question 379228: -15=5b
Click here to see answer by ocean101(1)

Question 378980: a ferris wheel has a radius of 80 feet. two particular cars are located such that the central angle between them is 165 degrees. to the nearest tenth, what is the measure of the intercepted arc between those two cars on the farris wheel?
Click here to see answer by ankor@dixie-net.com(15652)

Question 379374: what are the 6 trigonomic ratios for 315 degrees

Click here to see answer by richard1234(5390)

Question 379535: Please help me solve these 2 questions:
14. If f(x)=3-2x and f^-1 denotes the inverse of f, then f^-1(o) is ?
15. What is the solution set of 2sin^2(x)-3sin(x)-2=0 where 0<=x<=2pi .
Thank so much!
Click here to see answer by J2R2R(94)

Question 379346: Find all values of x in the interval [0, 2π] that satisfy the given equation.
−sin 2x =3 cos x
Click here to see answer by Fombitz(13828)

Question 379532: Please help me with 2 questions:
1. where can I defined tan X=?
2. If cotx^0=1, then x=?
Thanks
Click here to see answer by Fombitz(13828)

Question 379975: Solve the following trigonometric equations over the interval 0≤θ≤2π:

4tan(θ/2)-4=0
Click here to see answer by richard1234(5390)

Question 379901: I have been working on this problem over 2 hours and can't figure out how to solve it. can you please help?? Any suggestions how to even start?? Thank you.
A population of wild rabbits in a local reserve has a cyclic pattern over a year's time; its formula is given by P(t)= 20 cos((pi/6)t)+120, where P represents the number of wild rabbits t months after January (t=0).
a) What is the lowest population possible for the rabbits and when does it occur?
b) When does the population first reach 130 rabbits? When t=?
c) Hunting permits for the rabbits are stopped when the population drops to 100 rabbits. When should the permits be stopped?
Click here to see answer by kingme18(98)

Question 380408: factor: 2x^3+16
Click here to see answer by Earlsdon(6287)

Question 380240: how do i solve cos(x/7)= 7x
Click here to see answer by Fombitz(13828)

Question 380485: How to write the six trigonometric functions for
Click here to see answer by stanbon(57352)

Question 380765: Trigonometric functions describe relationships between the angles and lengths of the sides of a right triangle. Give a real world example showing how this can be used. Be sure to include the specific trig relationship that would be used in the situation you describe. If possible, include a diagram to show the relationships. (IN TEXT)
Click here to see answer by richard1234(5390)

Question 380962: Solve by factoring: 4/x-1 = 5/2x-2 + 3x/4

Click here to see answer by Dae-Ho(3)

Question 381387: Please help me:
1. The radian measure of angle containing x degree is: A.pi.x/180 B. pi.x/90 .C other answer(plz explain)
2. If cos x=1/2, then sin x= ?
3. If cotx=1, then x= ?
Click here to see answer by richard1234(5390)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540