Questions on Algebra: Trigonometry answered by real tutors!

Tutors Answer Your Questions about Trigonometry-basics (FREE)

Question 211940: Please help me solve this equation:
Click here to see answer by Alan3354(30993)

Question 211804: if a=22, b=14, and c=30, find the area of triangle ABC.
a)33 sq units
b)121.0 sq units
c)130.2 sq units
d)143.8 sq units
Click here to see answer by HyperBrain(694)

Question 211794: in triangle ABC, A=47 degrees,b=12,c=8.find a to the nearest tenth
a)6.3
b)8.7
c)8.8
d)18.4
Click here to see answer by HyperBrain(694)

Question 211809: change 29pi/37 radians to degree measure
a)5220 degrees
b)141.1 degrees
c)167.6 degrees
d)66.6 degrees
Click here to see answer by HyperBrain(694)

Question 211795: in triangle ABC,a=7.8, b=4.2, c=3.9. find B to the nearest tenth.
a)15.1 degrees
b)148.7 degrees
c)78.9 degrees
d)16.2 degrees
Click here to see answer by HyperBrain(694)

Question 212096: prove
Sin(90-θ)/sec(90- θ)*tan(90- θ)/cos θ=cos θ
Click here to see answer by jsmallt9(3296)

Question 212324: Identify the angles between 0 degrees and 360 degrees whose terminal sides are on y = x.
Click here to see answer by rapaljer(4667)

Question 212337: sin 50 degrees equals 2 sin 25 degrees.... true or false? Also an explanation please?
Click here to see answer by stanbon(57361)

Question 212337: sin 50 degrees equals 2 sin 25 degrees.... true or false? Also an explanation please?
Click here to see answer by rapaljer(4667)

Question 212337: sin 50 degrees equals 2 sin 25 degrees.... true or false? Also an explanation please?
Click here to see answer by Alan3354(30993)

Question 212319: Draw the angle in quadrant I whose terminal side is on y = 4x.
Click here to see answer by Alan3354(30993)

Question 212350: x^2=10x-11
Click here to see answer by stanbon(57361)

Question 212348: Find all angles t such that 3t is coterminal with 180 degrees and t is between 0 degrees and 360 degrees.
Click here to see answer by HyperBrain(694)

Question 212322: Draw the angle in quadrant II whose terminal side is on 1/2x + y = 0.
Click here to see answer by HyperBrain(694)

Question 211786: the angle of elevation from the end of the shadow to the top of the building is 63 degrees and the distance is 220 feet.find the length of the shadow to the nearest foot
a)100 feet
b)196 feet
c)432 feet
d)112 feet
Click here to see answer by HyperBrain(694)

Question 207935: Given a point (5,-5) on the terminal side of angle0, find the value of sin.
Click here to see answer by HyperBrain(694)

Question 212525: Give the exact value of the following. If it is undefined, so state.
1)tan 4pi/3
2)sin 120 degrees
3)cos 5pi/6
I am having trouble figuring out all of the problems like the ones listed. Please help.

Click here to see answer by stanbon(57361)

Question 212554: On his trip to work each day, Brady pays the same toll, using either all quarters or all dimes. If the number of dimes needed for the toll is 3 more than the number of quarters, what is the toll?
Click here to see answer by stanbon(57361)

Question 207519: Complete the following Identity
cos 2x =
Click here to see answer by HyperBrain(694)

Question 207286: If the latitude of Chicago is about 42 degrees and the radius of the earth is about 4000 miles, how far is Chicago from the equator? ( use pi= 3.1416)

Click here to see answer by HyperBrain(694)

Question 204685: Can you help me solve this trigonometric identities question: 1)Prove each of the following identities.
a)cos^2 x +2sin^2 x -1=sin^2 x
Click here to see answer by HyperBrain(694)

Question 199242: Given the Triangle ABC with b=8,c=10, A=74 degrees what is the length of a?
Click here to see answer by HyperBrain(694)

Question 197454: Solve for x in the equation (1 +sinx/cosx)+(cosx/1+sinx)=4 for 0≤ x ≤ 2π rad.
Click here to see answer by HyperBrain(694)

Question 212762: determine the number of possible solutions if A=62 degrees, a=4, and b=6
a)none
b)one
c)two
d)three
Click here to see answer by drj(1380)

Question 212763: determine the greatest possible value for B if A=30 degrees, a=5, and b=8
a)23.1 degrees
b)53.1 degrees
c)126.9 degrees
d)96.9 degrees
Click here to see answer by drj(1380)

Question 212764: change radians to degree measure
a)5220 degrees
b)141.1 degrees
c)167.6 degrees
d)66.6 degrees
Click here to see answer by Earlsdon(6287)

Question 212764: change radians to degree measure
a)5220 degrees
b)141.1 degrees
c)167.6 degrees
d)66.6 degrees
Click here to see answer by Edwin McCravy(8909)

Question 212759: suppose (theta) is an angle in the standard position whose terminal side lies in quadrannt 2.if sin(theta)=12/13, find the value of sec(theta)
Click here to see answer by rapaljer(4667)

Question 212761: in triangle ABC, A=27 degrees 35' , B=78 degrees 23' , and c=19.find a.round to the nearest tenth.
a)8.6
b)9.2
c)12.8
d)19.4
Click here to see answer by drj(1380)

Question 212805: find the value of x for which the equation sin x=-1 is true
a)2pi(n)
b)pi/2 + 2pi(n)
c)pi + 2pi(n)
d)3pi/2 + 2pi(n)
Click here to see answer by Fombitz(13828)

Question 211791: determine the greatest possible value for B if A= 30 degrees, a=5, and b=8
a)23.1 degrees
b)53.1 degrees
c)126.9 degrees
d)96.9 degrees
Click here to see answer by drj(1380)

Question 212843: A gear rotates at a rate of 8 rotations per minute. Through how many degrees does it rotate in 2 minutes 15 seconds?
Click here to see answer by stanbon(57361)

Question 212804: the paddle wheel of a boat measures 16ft in diameter and is revolving at a rate of 20rpm.the maximum depth of the paddle wheel under water is 1 foot.suppose a point is located at the lowest point of the wheel at t=0.
use your function to find the height of the initial point after 5.5 seconds
a)7.5 ft
b)11 ft
c)10.4 ft
d)6.5 ft
Click here to see answer by jsmallt9(3296)

Question 212842: Identify the angles between 0 degrees and 360 degrees whose terminal sides are on the line x=0.
Click here to see answer by Alan3354(30993)

Question 212802: write an equation of the tangent function with period 3pi/8, phase shift -pi/5, and vertical shift -2
a)y=tan(8x/3 - 8pi/15)-2
b)y=tan(8x/3 + 8pi/15)-2
c)y=tan(16x/3 + 3pi/80)-2
d)y=tan(8x/3 - 3pi/40)-2
Click here to see answer by jsmallt9(3296)

Question 212959: Four more than seven times a number is six less than five times the number. What is the number?
Click here to see answer by rfer(12660)

Question 212798: write an equation of the sine function with amplitude 3,period 3pi/2, and phase shift pi/4
a)y=3sin(3x/2 - pi/4)
b)y=-3sin(4x/3 - pi/4)
c)y=-3sin(3x/2 - 3pi/8)
d)y=3sin(4x/3 - pi/3)
Click here to see answer by Edwin McCravy(8909)

Question 213143: y=-3sin (2x+3.14/2)
Click here to see answer by drj(1380)

Question 212361: Draw the angle in quadrant II whose terminal side is on 1/2x + y = 0.
Click here to see answer by Alan3354(30993)

Question 213539: find the distance between the lines with equations y=3x-9 and y = 3x - 4.
a)5/4
b)5 sqrt(10)/2
c)sqrt(10)/2
d)13 sqrt(10)/2
Click here to see answer by drj(1380)

Question 213743: Obtain the area of a triangular plastic sheet whose sides are 3.93m and 4.15m if the angle between them is 41degrees 30'.
Click here to see answer by Theo(3464)

Question 213742: A Building AB, is observed across a street from the window of a house 7 metres above the ground. If the angle of elevation of the top of the building is 23degrees and the angle of depression of the foot of the building is 26degrees, calculate the height of the building.
Click here to see answer by drj(1380)

Question 213877: find x-intercept and y- intercept and graph
3x-2y+8=0
Click here to see answer by drj(1380)

Question 213988: I just recently have learned how to find the vertex of a function. However, with this problem, the fraction ... confused me. :) I get half way through, then get entirely lost!

Determine the vertex of each function by completing the square.

y= 8x^2 + -14x + -72

Thanks!
-B
Click here to see answer by stanbon(57361)

Question 214062: Find all solutions of tan x = 1
Click here to see answer by Theo(3464)

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, 9541..9585