# Questions on Algebra: Trigonometry answered by real tutors!

Algebra ->  Algebra  -> Trigonometry-basics -> Questions on Algebra: Trigonometry answered by real tutors!      Log On

 Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations! Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

 Algebra: Trigonometry Solvers Lessons Answers archive Quiz In Depth

## Tutors Answer Your Questions about Trigonometry-basics (FREE)

 Question 429451: Please find sin cos and tan. sin (theta) = 1 third. 1/3 Click here to see answer by poliphob3.14(115)

 Question 429559: multiply and simplify using the trigonometric identities (sin beta + cos beta) power of 2 Click here to see answer by htmentor(807)

 Question 429492: cosx*tgx+sin2x=2 Click here to see answer by Alan3354(31518)

 Question 429591: 5=3+7cos((3.14/4)(x-3)) Click here to see answer by ewatrrr(10682)

 Question 429676: Determine the phase shift of y=sin(3x-2 pi) Click here to see answer by Alan3354(31518)

 Question 429675: How do you work out the following problem to find two points? y=2tan2x Click here to see answer by Alan3354(31518)

 Question 429714: Solve for h Tan 75=(h/510-h) Assignment due by 7:15 today,need immediate help if possible. Thank you Click here to see answer by Gogonati(817)

 Question 429856: Suppose alpha (a) is an angle in Quadrant II and beta is an angle in Quadrant III such that sin(a)= 4/5 and cos(b)= -3/4 A) Find the exact value of cos(a) B)Find the exact value of sin(b) (a stands for alpha and b for beta) I didn't exactly comprehend my teacher's explanation so any help will help me a lot. Thanks in advance if anyone helps. (also, sorry if this is cramming too many problems....?) Click here to see answer by lwsshak3(6755)

 Question 429870: cos(x+(π/2))-cos(2x)=0 Click here to see answer by robertb(4012)
 Question 429870: cos(x+(π/2))-cos(2x)=0 Click here to see answer by Gogonati(817)

 Question 429905: Please help me solve this trigonometry problem. I have to "Find the exact values of x and y." Please help me. The problem is a 45-45-90 triangle and the two legs have values of 13 and i need to find the hypotenuse. I tried to work on it and I got: . Im not sure if I am supposed to leave it like that or not. is that the final answer? Click here to see answer by stanbon(57962)

 Question 430337: word problem: A double axel is a figure-skating jump in which the skater makes 2.5 revolutions in the air. If a skater is in the air for 0.66s during a double axel, what is her average angular speed to the nearest degree per second? this is how i solved it, is it right? 2.5 revolutions = 900 degrees so 900 divided by .66 equals 1364% Click here to see answer by Alan3354(31518)

 Question 430524: how do i go about finding the answer to 4 x to the 2nd power + 81 - 36x= Click here to see answer by Alan3354(31518)

 Question 430452: solve 3cosec^2 x-4=0 sqt3 cot x-1=0 for the interval 0 to 2pi Click here to see answer by Alan3354(31518)

 Question 430649: Find the value of sin58(degrees) 25'(minutes)to the nearest thousandth Click here to see answer by Alan3354(31518)

 Question 430750: I am having trouble understanding how to find 2 real #'s between -2pi and 2pi that determine the point on the unit circle. i know 1 time around the unit circle is 2pi and one time around the unit circle clockwise is -2pi. I also need help to determine suppement of 5pi/12 and complement of 3pi/8. I am looking at my book and teacher's notes and I don't see it explained at all. Thanks so kindly for your time. Click here to see answer by stanbon(57962)
 Question 430750: I am having trouble understanding how to find 2 real #'s between -2pi and 2pi that determine the point on the unit circle. i know 1 time around the unit circle is 2pi and one time around the unit circle clockwise is -2pi. I also need help to determine suppement of 5pi/12 and complement of 3pi/8. I am looking at my book and teacher's notes and I don't see it explained at all. Thanks so kindly for your time. Click here to see answer by Alan3354(31518)

 Question 430780: Please any answer is appreciated for the following: Prove that cos[3*pi/2 + x] = sinx THank You Click here to see answer by richard1234(5390)

 Question 430840: I am stuck on the following question: Solve for x in the equation: (1+sinx)/cosx + cosx/(1+sinx) = 4 for 0<=x<=2pi rads Any help is appreciated Thank You Click here to see answer by lwsshak3(6755)

 Question 431008: how do i evaluate arccos(cos 7pi/2) using the properties of inverse functions? Click here to see answer by richard1234(5390)

 Question 431148: Show an evaluation of sin 120 degrees using the trigonometric addition formulas. Show an evaluation of sin 120 degrees using the double-angle formulas. Click here to see answer by lwsshak3(6755)

 Question 428515: Im working on trigonometric function and not sure how solve or graph these the problem is y= 3 cot(x+pie over 4). I have tried to understand but i am lost thank you Click here to see answer by lwsshak3(6755)

 Question 428088: find the exact value of cos 225 degrees Click here to see answer by lwsshak3(6755)

 Question 431468: Use the sum angle formula to simplify cos(x + 270○) Click here to see answer by Gogonati(817)

 Question 431469: Derive the half angle formula for sin( u/2 ) by following the steps below. (a) Use the sum angle formula to write cos(2x) in terms of powers of sin(x) and cos(x) . (b) Use a trig identity to rewrite cos(2x) in terms of just powers of sin(x): (c) Solve the formula in part (b) in terms of sin(x), and not a power of sin(x). (d) Substitute x = u/2 into the formula in part (c). Click here to see answer by richard1234(5390)

 Question 431693: how do you solve this help show me please so i can understand Click here to see answer by richard1234(5390)

 Question 432419: Find angle a of a triangle with sidec=13 and side b =12 Click here to see answer by belle3833(46)

 Question 432502: secx-cosx=tanxsinx Click here to see answer by Alan3354(31518)
 Question 432502: secx-cosx=tanxsinx Click here to see answer by MathLover1(6812)

 Question 432307: sin[arccos1/2 + arcsin(-1)] Click here to see answer by lwsshak3(6755)

 Question 432271: there are four values of x in the interval 0≤ θ ≤360 that satisfy the equation 2 sin 2x+cosx=0. Which of the following is NOT a solution to this equation? a)14.5 b)90 c)194.5 d)270 Click here to see answer by lwsshak3(6755)

 Question 432268: Find m(x) in the interval180(degrees)<(or equal)x >(or equal) 270(degrees) that satisfies the equation 2cos x+1=0 Click here to see answer by lwsshak3(6755)

 Question 433087: What is tan 300 degrees/ cosine 540 degrees Click here to see answer by ewatrrr(10682)

 Question 433250: Can someone explain to me how the exact value of Sin^(-1) [Sin(-7pi/6)] is pi/6? I got -1/2... Click here to see answer by josmiceli(9817)

 Question 433312: verify idenity csc x = (sin x)/2(1 + cosx) + (sin x)/2(1-cosx) Click here to see answer by katealdridge(100)

 Question 433359: How to establish this identity? Csc(theta) x Cos(theta) = Cot(theta) ? Click here to see answer by Alan3354(31518)

 Question 433307: verify the idenity sec^2x – csc^2x = (tan x – cot x)/(sinx*cosx) Click here to see answer by Alan3354(31518)

 Question 433310: verify identinty sec^4x – (tan^4x + sec^2x) = sec^2x · sin^2x Click here to see answer by Alan3354(31518)

 Question 433309: sec^4x – sec^2x = tan^4x + tan^2x Click here to see answer by Alan3354(31518)

 Question 433311: verify idenity (cos^4x – sin^4x)/(cosx + sinx) = cos x – sin x Click here to see answer by belle3833(46)

 Question 433403: sketch the graph of y=5sin (x-pi/3) and y=7cos(x+pi/6) Click here to see answer by Alan3354(31518)

 Question 433559: verify the question sec^2x-csc^2x=(tanx-cotx)/(sinx*cosx) Click here to see answer by MathLover1(6812)

 Question 433558: verify the idenity sec^2x – csc^2x = (tan x – cot x)/(sinx*cosx) Click here to see answer by Edwin McCravy(8999)

 Question 433555: verify the idenity sec^4x – sec^2x = tan^4x + tan^2x'' Click here to see answer by Edwin McCravy(8999)

 Question 434030: Use an addition or subtraction formula to write the expression as a trigonometric function of one number, and then find its exact value. cos(30)cos(60)- sin(30)sin(60) Click here to see answer by robertb(4012)

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, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810