Questions on Algebra: Trigonometry answered by real tutors!

Tutors Answer Your Questions about Trigonometry-basics (FREE)

Question 570999: (2x − y) − 32i = 4 + 4yi
solve for x and y
Click here to see answer by JBarnum(1826)

Question 570993: Can you pull of coefficients of sine? That is, can you do moves like this:
sin(1/2theta)=1/2sintheta?
If the answer is "yes", prove it using identities or geometry. If the answer is "no", give an example of a particular theta for which this fails.
Click here to see answer by Alan3354(21551)

Question 570725: Explain why sin(7 degrees)+ sin(353 degrees)= 0
Click here to see answer by richard1234(4789)

Question 570729: Explain why there are no solutions to logbcos(theta)=.01 for any base b>1
(b is not an exponent but the thing that goes down instead of up, don't know the name for it)
Click here to see answer by richard1234(4789)

Question 570773: If A + B + C = 180°,Prove that
Cos²A + Cos²B + Cos²C = 1-2cosAcosBcosC
Click here to see answer by richard1234(4789)

Question 570642: How do you find the supplementary and complementary of a radian?
Example: 2pie/13 ???
Click here to see answer by Alan3354(21551)

Question 570222: hey how would you solve this problem: select the expression below that is identical to tan(-x)tan(pi/2-x). and here are the choices: A. 1, B. tan squared x, C. -1, D. 2sin squared x, E. 2csc squared x.

Click here to see answer by lwsshak3(2915)

Question 570383: graph:
y=2sec(x-(3.14/2))+1
Click here to see answer by stanbon(48510)

Question 570330: what is the exact value of cos 235?
Click here to see answer by Alan3354(21551)

Question 570225: hi. can you help me solve: simplify this expression: (1+cosx)/(sinx) + (sinx)(1+cosx)
thanks
Click here to see answer by htmentor(580)

Question 570225: hi. can you help me solve: simplify this expression: (1+cosx)/(sinx) + (sinx)(1+cosx)
thanks
Click here to see answer by Alan3354(21551)

Question 570187: write each of the following in terms of sine. show complete solution
tanx
-----
secx

Click here to see answer by Alan3354(21551)

Question 570166: How do I work this? I am drawing a blank. Thank You for any help.
sin θ = - ½ , 180° < 0 < 270°, find tan θ
Click here to see answer by stanbon(48510)

Question 570020: What is the trig. functions if sin t =12/13, terminal point t is in the second quadrant ?
cos t =
tan t =
cot t =
sec t =
csc t =

Click here to see answer by lwsshak3(2915)

Question 569738: prove step-by-step that:
(secx-1/tanx) + (tanx/secx+1) = (2sinx/1+cosx)
This is really important, any help ASAP would be awesome, thank you!!
Click here to see answer by lwsshak3(2915)

Question 570018: 3pi/2 + 3pi/2

Click here to see answer by Alan3354(21551)

Question 569895: Simplify (sin(x)tan(x))/cos(x)
Have tried (sin(x)[sin(x)/cos(x)](cos(x))
then sin(x)sin(x) but when I put sin^2(x) as the answer it says I'm wrong
Click here to see answer by Alan3354(21551)

Question 569894: Simplify (sin(x)tan(x))/cos(x)
Have tried (sin(x)[sin(x)/cos(x)](cos(x))
then sin(x)sin(x) but when I put sin^2(x) as the answer it says I'm wrong
Click here to see answer by jim_thompson5910(21667)

Question 569237: ((cotA-cosA)(1+sinA)) all divided by cos^3A = cscA i am trying to simplify the left side to get it to equal the right. This is really urgent so any help right away would be GREATLY appreciated!!! Thanks
Click here to see answer by scott8148(5879)

Question 568922: Find the exact values of sin13/6π, cos13/6π, and tan13/6π.
Just not sure what method to use to solve this~
Thanks :)
Click here to see answer by lwsshak3(2915)

Question 568765: (cscx+ cotx)(1-cosx)=sinx
I don't know how to proove the question. I tried and got a different answer. Can you help me?
Click here to see answer by sEahors3(4)

Question 568765: (cscx+ cotx)(1-cosx)=sinx
I don't know how to proove the question. I tried and got a different answer. Can you help me?
Click here to see answer by Alan3354(21551)

Question 568645: the cosine of an angle in a right triangle is 4/7. what is the sine of this angle?
Click here to see answer by nyc_function(2626)

Question 568470: Find the smallest positive number t such that
cos[tan(t)] = 0.6
Click here to see answer by AnlytcPhil(1116)

Question 567944: To solve for all angles (theta) for which sin(theta) = -cos(theta), do I use the inverse function or the reciprocal?
Click here to see answer by Alan3354(21551)

Question 567914: The vertex angle of an isosceles triangle is 72°,and each of equal sides is 10 cm.Find the perimeter and the area of of the triangle.
Click here to see answer by mananth(10541)

Question 567705: Find the values of the six trigonometric functions of θ if the terminal side of Ɵ lies on the given line in the specified quadrant
y = x, quadrant 3
Click here to see answer by Edwin McCravy(6931)

Question 567619: cotx-tan^2=0
Click here to see answer by Alan3354(21551)

Question 567602: from point A which is 30m from the base of a building B, the angle of elevation to the top of the building C is 56 degrees, and to the top of the flag pole CD is 60 degrees. find the length of the flag pole
Click here to see answer by stanbon(48510)

Question 567603: an aeroplane takes off from the ground at an angle of 27 degrees and its average speed in the first 10 seconds is 200 km/h. what is the altitude of the plane at the end of this time?
Click here to see answer by nerdybill(5403)

Question 567171:
Click here to see answer by nottohave(4)

Question 567036: sqrt(9-x^2) where x=3sin...i understand it is factoring and i know the answer is 3|cos| i just am having problems so i see the question to this point
sqrt(9-3sin^2)
Click here to see answer by Edwin McCravy(6931)

Question 567026: an arc is 0.04 meters long and is intercepted by a central angle of circumfrence/8 radians. what is the diameter of the circle?
Click here to see answer by stanbon(48510)

Question 566972: if tanθ = -3/4 90°<θ<180°, find cosθ
Click here to see answer by lwsshak3(2915)

Question 566286: find the cosine and sine of 240 degree
Click here to see answer by ad_alta(170)

Question 566233: graph two priods of Y= 1/2 cot x
Click here to see answer by jim_thompson5910(21667)

Question 566227: graph Y= 2 tan X/4
Click here to see answer by jim_thompson5910(21667)

Question 566114: in a circle witha 10-ft diameter, and arc 20ft long subtends an angle of how many radians?how many degrees, to the nearest degree?
Click here to see answer by Alan3354(21551)

Question 565800: If 0 degrees less than or equal to x less than or equal to 360 degrees, solve the equation sin x= -square root of 3 over 2
Click here to see answer by ad_alta(170)

Question 565890: Find two positive real numbers with a maximum product whose sum is 110.
Click here to see answer by stanbon(48510)

Question 565832: write an expression for all the angles coterminal with 4pi/3. express answer in radian form. find the measures of two other angles, one positive and one negative, that are coterminal with the angle.
Click here to see answer by solver91311(12118)

Question 565338: Evaluate and write radicals in simplest form using
Click here to see answer by lwsshak3(2915)

Question 564912: int 3x^(2) e^(-x) dx=
Click here to see answer by richard1234(4789)

Question 565076: What is the tangent of 70degrees in radical form?

Click here to see answer by Alan3354(21551)

Question 565039: sin(15.2 degrees), whats the answer?
Click here to see answer by stanbon(48510)

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