Questions on Algebra: Trigonometry answered by real tutors!

Tutors Answer Your Questions about Trigonometry-basics (FREE)

Question 33122: find the exact value, leaving the answer in a proper form of sin -300 degrees.
Click here to see answer by sarah_adam(201)

Question 33124: find the exact value, leaving the answer in a proper form of cos 135 degrees.
Click here to see answer by sarah_adam(201)

Question 33125: Simplify the following as much as possible leaved the answer in exact form:
sin 225 degrees ctn 300 degrees + sec 150 degrees cos 315 degrees
Click here to see answer by venugopalramana(3286)

Question 33123: find the exact value, leaving the answer in a proper form of sec 540 degrees.
Click here to see answer by venugopalramana(3286)

Question 33163: Multiply 11-7i by -3+4i
Click here to see answer by sarah_adam(201)

Question 33162: Subtract 4-7i from -8-9i
Click here to see answer by sarah_adam(201)

Question 33173: Solve: Arc sin 2x + Arc sin x = pi/2.
Click here to see answer by Fermat(127)

Question 33224: In any triangle, A=62 degrees, c=15, and b=12; find the area.
Click here to see answer by sarah_adam(201)

Question 33174: Using DeMoivre's Theorem, find three distinct cube roots of 125
Click here to see answer by venugopalramana(3286)

Question 33172: Express 1 + 2i in polar form.
Click here to see answer by venugopalramana(3286)

Question 33252: sec 60 degrees
Click here to see answer by sarah_adam(201)

Question 33251: csc 45 degrees
Click here to see answer by sarah_adam(201)

Question 33394: A submarine travels 2.6 miles diving at an angle of 8 degrees. How deep is the submarine beneath the surface of the water?
Click here to see answer by mszlmb(115)

Question 33161: Find the value of Arc sin (cos pi/4).
Click here to see answer by stanbon(57246)

Question 33160: Find the degative angles between -360 degrees and 0 degrees for arc cos (-1/2).
Click here to see answer by Nate(3500)

Question 33120: find the exact value, leaving the answer in a proper form of tan 240 degrees.
Click here to see answer by Nate(3500)

Question 33118: express as the cofunction of a positive acute angle not using a calculator of tan -235 degrees.
Click here to see answer by venugopalramana(3286)

Question 33117: express as the cofunction of a positive acute angle not using a calculator of sin 340 degress.
Click here to see answer by venugopalramana(3286)

Question 33116: express as the cofunction of a positive acute angle not using a calculator of sec -160 degrees.
Click here to see answer by venugopalramana(3286)

Question 33115: express as the confunction of a positive acute angle not using a calculator of ctn 250 degrees.
Click here to see answer by venugopalramana(3286)

Question 33795: Evaluate the following to 4 decimal places. tan3.75 radians
I put down...
tan3.75(pi)
15(pi)/(divided by)4=180/(pi)
tan675-(360)
tan45=-1.0000
but i got it wrong on my test, can you show me what i did wrong?
Click here to see answer by venugopalramana(3286)

Question 33838: Find the negative angles between -360 degrees and 0 degrees for arc cos (-1/2).
Click here to see answer by stanbon(57246)

Question 33839: What is the area of this triangle: a=33 b=52 c=21
Click here to see answer by sarah_adam(201)

Question 33755: hi please can you help me with coterminal angles i try really hard in school but
i can't get it this is my only help to pass this class. um could you tell me how to find the coterminal of 47 and also the reference angle of 370 these are not from textbooks. thank you so much!!!!!!!!!!!
Click here to see answer by stanbon(57246)

Question 33862: cosq = 5/12 and tanq is negative, find the exact value for cscq.

Click here to see answer by AnlytcPhil(1276)

Question 33857: 2 cos phi multiply csc 2phi = csc phi: prove the identity.
Click here to see answer by sarah_adam(201)

Question 33126: In a right triangle, angle A = 41 degrees and a = 20 in.; find c to the nearest hundredth.
Click here to see answer by kietra(57)

Question 33861: cos theta = 5/12 and tan theta is negative, find the exact value of sec theta.

Click here to see answer by stanbon(57246)

Question 33859: cos theta = 5/12 and tan theta is negative, find the exact value for tan theta.
Click here to see answer by stanbon(57246)

Question 34008:

Solve this triangle, if possible: a=8.4 b=22.1 A=33°46'

Click here to see answer by AnlytcPhil(1276)

Question 34012: graph: y = 3 sin 2theta
Click here to see answer by fanism(39)

Question 34015: The angular velocity of a merry-go-round is 35 radians/minute. If the diameter is 38 feet, find the linear velocity of a person standing on the very edge of the merry-go-round.
Click here to see answer by xcentaur(357)

Question 34010: The sin theta= -3/4, tan theta is positive, find the other five functions (their exact values).
Click here to see answer by algebrapro18(206)

Question 34076: prove this identity: cos theta tan theta csc theta = 1
Click here to see answer by sarah_adam(201)

Question 34207: 2/3 radians is how much degreees exactly?
Click here to see answer by ichudov(499)

Question 34208: Find A, when a = 7 and b = 12.
Click here to see answer by ichudov(499)

Question 34204: 15 degrees is how much radians exactly?
Click here to see answer by sarah_adam(201)

Question 34206: The sec theta = square root of 29 over 5, sin theta is negative. Find the other five functions (their exact value).
Click here to see answer by stanbon(57246)

Question 34202: Find c, when b=20 and A=70 degrees
Click here to see answer by tmarienatree(17)

Question 34200: Find a, when b=10 and B=34 degrees
Click here to see answer by tmarienatree(17)

Question 34071: Express cos 148 degrees as the same function of a positive acute angle.
Click here to see answer by kietra(57)

Question 34072: express tan 221 degrees as the same function of a positive acute angle.
Click here to see answer by kietra(57)

Question 34073: express sec -123 degrees as the same function of a positive acute angle.
Click here to see answer by kietra(57)

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