Questions on Algebra: Trigonometry answered by real tutors!

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Question 82078: please help me factor this problem

Click here to see answer by stanbon(26295)

Question 82091: Ina right triangle, sinB = 2/3, find the cosB
Click here to see answer by funmath(2873)

Question 82212: Evaluate the function without using a calculator.
Sin 300°
Click here to see answer by chitra(359)

Question 82576: What is the size, in degrees, of the angle subtended by an arc of 1 2/3 ft in a circle whose radius is 45 in.?
Click here to see answer by josmiceli(3012)

Question 82211: Evaluate the function without using a calculator.
Sin 300°
Click here to see answer by kev82(145)

Question 80909: find the exact value of cos165
Click here to see answer by kev82(145)

Question 82740: how do you factor 30x^3+13x^2-10x

Click here to see answer by funmath(2873)

Question 82740: how do you factor 30x^3+13x^2-10x

Click here to see answer by twoshortm(1)

Question 82694: simplify the expression: cscx(tan(-x))
simplify the expression: cotxcos(3.14/2-x)
verify the identity: cos^4x-sin^4x=cos^2x-sin^2x

Click here to see answer by kev82(145)

Question 82694: simplify the expression: cscx(tan(-x))
simplify the expression: cotxcos(3.14/2-x)
verify the identity: cos^4x-sin^4x=cos^2x-sin^2x

Click here to see answer by funmath(2873)

Question 82757: how do I factor this x^2+5x+7
Click here to see answer by scott8148(3385)

Question 82840: Given that sin x equals and that cos x is negative, find the other functions of x and the value of x.
Click here to see answer by Edwin McCravy(2922)

Question 82845: using the exact values find the numerical value of
a. sin 30degrees cos 240degrees + sin 210degrees sin 300degrees
b. tan 225degrees + tan (-45degrees)
Click here to see answer by stanbon(26295)

Question 82930: Please, find the maximum extrema for f(x) = cos(x)(cos(x) + 1) using derivatives.
Click here to see answer by Nate(3495)

Question 83180: Find the value of:
a. log sin 62° 22' 33"
b. log cot 28° 13' 17"
c.log cos 125° 15' 23"
d.log tan 78° 45' 50"
Click here to see answer by Edwin McCravy(2922)

Question 83242: A 12-foot guy wire is attached to a telephone pole 10.5 ft from the top of the pole. If the wire forms a 52 degree angle with the ground, how high is the telephone pole?
Click here to see answer by Edwin McCravy(2922)

Question 83259: Could you please find the area bounded by the curve [0,] of f(x) = sin(x) using antiderivatants?
Click here to see answer by Nate(3495)

Question 83323: Please help me! I am so stupid at math... Find the area under the curve f(x) = x^2 bounded by [0,4] ... This is hard for me ... especially when I have to deal with six babies! Thanks for the help!
Click here to see answer by Nate(3495)

Question 83452: My dad is in a blimp. Dad says that when f(x) = sin(x/3.14) is positive .. he is elevated. When f(x) = sin(x/3.14) is negative ... he is below his natural range. Of course, x is in seconds. How many bobs does he take if he adventures for 20 seconds?
Click here to see answer by stanbon(26295)

Question 83178: express each of the following as the same function of a positive acute angle:
a. cos 112degrees 33'
b.tan 310degrees
c.cot 138degrees 15' 10"
d.sin (-140degrees)
Click here to see answer by Edwin McCravy(2922)

Question 83608: guy wire is attached to the top of an antenna and to a point on level ground that is 50 ft from base of antenna. if wire makes a 66 degree angle with ground. what is approx height of antenna to nearest ft?
Click here to see answer by dolly(163)

Question 83610: find the period of the graph of the equation y=3cos(x/2+ pie)
Click here to see answer by uma(370)

Question 83668: ladder 18ft long leans against vertical wall and makes angle of 72 degrees with level ground. how highup the wall does hte ladder reach to nearest tenth of foot
Click here to see answer by ankor@dixie-net.com(6693)

Question 83669: use fundamental identities to write cot(theta) in terms of sin(theta) for any acute angle theta
Click here to see answer by stanbon(26295)

Question 83854: find amplitude and phase shift of a graph of the equation y=3cos(x+pi)
Click here to see answer by stanbon(26295)

Question 83852: approximate to the nearest degree all angles theta in the interval[0,360) that satisfy cos theta= -0.1736
Click here to see answer by stanbon(26295)

Question 84007: find exact value of tan(sin^-1(-4/5))
Click here to see answer by kev82(145)

Question 84010: find all solutions to equation tan x=1
Click here to see answer by jim_thompson5910(13794)

Question 84009: find all solutions to equation sin x=0
Click here to see answer by jim_thompson5910(13794)

Question 84012: find all solutions in interval [0,2pi] to equation 2cos(x-pi/2)=1
Click here to see answer by stanbon(26295)

Question 84011: find all solutions to equation sqrt2 sin x=1
Click here to see answer by Nate(3495)

Question 84006: find exact value of cos(sin^-1(3/5))
Click here to see answer by stanbon(26295)

Question 84062: Find the approximate values of x, -360 <=x <= 360), in each trigonometric equation.
A. -1=cos x
b. 3=-cos3x+2
c.-1=sin0.5x+1
d. 1=sin0.5+1
e. -4=3sinx-2
Click here to see answer by stanbon(26295)

Question 84048: using trigonometric identities to simplify the expression (csc theta)(sec theta - cos theta)
Click here to see answer by Edwin McCravy(2922)

Question 84050: find all solutions of the equation 2sin(2x)=sqrt3 in the interval [0,2pi]
Click here to see answer by Nate(3495)

Question 84049: find all solutions in the interval[0,2pi] to the equation cos^2 x=1
Click here to see answer by Nate(3495)

Question 84047: using trigonometric identities to simplify the expression (csc theta)(1-cos^2 theta)(cot theta)
Click here to see answer by Nate(3495)

Question 84220: express as trignometric function of 1 angle sin44degreescos22degrees-cos44degreessin22degrees
Click here to see answer by venugopalramana(3286)

Question 80521: I have a TI-30XA calculator. I have the following problem to solve and can't seem to make it work with the Calculator. If could give me step by step using this calculator to solve this I would very much appreciate it.
Problem:
"Find the measure of the acute angle that satisfies the given equation. Round your answers to the nearest tenth of a degree"
1. tan A=3/4
2. tan B=13/7
3. tan C=3.123
4. tan C=0.9714
Thanks for your Help,
Mateo

Click here to see answer by vertciel(183)

Question 84221: if alpha and beta are acute angles with sin alpha=2/sqrt5 and beta=1/sqrt5, find exact value of sin(alpha+beta)
Click here to see answer by tutor_paul(424)

Question 84564: cosx+sinx-tanx/cscx
Click here to see answer by Edwin McCravy(2922)

Question 84643: express as a product sin(6t) + sin(2t)
Click here to see answer by uma(370)

Question 84856: Hi. I've tried this problem but could not come up with a logical answer.
"A monk has a very specific ritual for climbing up the steps to the temple. First he climbs up to the middle step and meditates for 1 minute. Then he climbs up 8 steps and faces east until he hears a bird singing. Then he walks down 12 steps and picks up a pebble. He takes one step up and tosses the pebble over his left shoulder. Now, he walks up the remaining steps three at a time which only takes him 9 paces. How many steps are there?"
Thank you so much for you help. I just couldn't reason this problem out...
Click here to see answer by rapaljer(3622)

Question 84895: Determine the exact value of the trigonometric functions listed below.
cot (135) = is it -1?
cos(pi/12)....where do I start?
Click here to see answer by jim_thompson5910(13794)

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