# Questions on Algebra: Trigonometry answered by real tutors!

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 Algebra: Trigonometry Solvers Lessons Answers archive Quiz In Depth

 Question 342229: how would you simplify the expression ln 1? (ln stands fro log natural) Click here to see answer by stanbon(57347)

 Question 342381: Determine the period of the function: http://img72.imageshack.us/i/function.jpg/ a. 2 b. 3 c. 6 d. 1 Click here to see answer by Alan3354(30993)

 Question 342382: In triangle ABC, C = 60 degrees, a = 12, and b = 5. Find c. Click here to see answer by Alan3354(30993)

 Question 342340: Proving trigonometric identities! secθ+tanθ/cosθ-tanθ-secθ = -cscθ Thank you! Click here to see answer by Alan3354(30993)

 Question 342338: Proving trigonometric identities! Please prove this! :(( Thank you! (1+cos3θ)^3/2 = 2sqrt(2) [1-sin^2 (3θ/2)] cos(3θ/2) Click here to see answer by Alan3354(30993)

 Question 342764: Solve for x: 3sin^2 x = cos^2 x ; 0 < = x < 2x Click here to see answer by Alan3354(30993)

 Question 342893: graph the expression and find two periods: 1/2sec(pie x/3-pie/3) Click here to see answer by Fombitz(13828)

 Question 343854: find all values of t in the interval [0,2pi] satisfying tant+1=0 Click here to see answer by Fombitz(13828)

 Question 343979: Find the amplitude of y = 6 cos 4(theta) a. 3/2 b. 6 c. 4 d. pi/2 Click here to see answer by Fombitz(13828)

 Question 343983: Find the phase shift of y= sin(theta - 3pi/4) a. 3pi/4 b. -3pi/4 c. 4pi/3 d. -4pi/3 Click here to see answer by Jk22(389)

 Question 343975: In triangle ABC, C = 60 degrees, a = 12, and b= 5. Find c. a. 109.0 b. 10.4 c. 11.8 d. 15.1 Click here to see answer by CharlesG2(828)

 Question 343981: Find the period of y = tan 5(theta) a. 10 pi b. 2pi/5 c. 5pi d. pi/5 Click here to see answer by CharlesG2(828)

 Question 344044: The members of the senior class are planning a dance. they use the equation r=pn to determine the total reciepts. what is n expressed in terms of r and p? Click here to see answer by checkley77(12569)

 Question 344506: Which angle is coterminal with a -400 degree angle in standard position? A. 40 B. 80 C. 320 D. 400 Thank you so much!!! Click here to see answer by jsmallt9(3296)

 Question 344829: Which of the following contains a false solution to the equation sinθ cotθ-cos^2 θ=0? A. 90 degrees and 270 degrees B. 0 degrees and 180 degrees C. 0 degrees and 270 degrees D. 90 degrees Thank you, Thank you so much for your help!!!!! Click here to see answer by Edwin McCravy(8909)

 Question 345713: what are the six trigonometric funtions of theta=300 Click here to see answer by solver91311(16885)

 Question 346684: what is the exact value of the reference angle, sec 945 degrees? Click here to see answer by jsmallt9(3296)

 Question 346793: Find the exact value of sin(5/3pi) A quick walkthrough would be appreciated Thanks in advance Click here to see answer by solver91311(16885)

 Question 346794: Given that cos(x)=-1/4(7^0.5) where pi < x < 3/2pi find sin(x) Quick walkthrough would be appreciated Thanks in advance Click here to see answer by solver91311(16885)

 Question 346912: solve the multi-angle equation below sin(2x)=sq roots 2/2 I appreciate. Click here to see answer by jsmallt9(3296)

 Question 347171: If θ = 60 degrees is a central angle in a circle of radius 6 feet, find the length of the arc cut off by θ to the nearest hundredth. Click here to see answer by stanbon(57347)

 Question 347675: y = 2 tan 2x graph two periods of the given tangent function Click here to see answer by Fombitz(13828)

 Question 347678: graph 2 periods of the given function y = 3 sec x Click here to see answer by Fombitz(13828)

 Question 347794: solve the equation tan x = 1 for the given interval of x -pi/2 Click here to see answer by Fombitz(13828)

 Question 347932: Hello I am trying to find the Period of y = cot 17pi/4 ? I think the Period is 0 because there isn't a x in the equation. Thanks Click here to see answer by Alan3354(30993)

 Question 348058: write the expression as an algebraic expression. Thank you cos(arccos x-arcsin x) Click here to see answer by user_dude2008(1861)

 Question 348080: find all solution of tan^3 x=tan x in the interval [0,2pie) Click here to see answer by Fombitz(13828)

 Question 348289: If x= 10cos theta, use trigonometric subtitution to write sq root of 100-x^2 as a trigonometric function of theta where 0 Click here to see answer by solver91311(16885)

 Question 348370: Find sec(theta) if tan(theta) = 1/4 and 180 degrees < (theta) < 270 degrees Click here to see answer by stanbon(57347)

 Question 348407: The height at time t (s) of a weight, oscillating up and down at the end of a spring is given below. s(t) = 900 + 70cos(t) (a) Find the velocity at t = π/4 s. (b) Find the acceleration at t = π/4 s. Click here to see answer by Fombitz(13828)

 Question 348533: Change the expression to an expression involving sines and cosines and simplify: tan(x) + 4sec(x) Click here to see answer by nyc_function(2733)

 Question 348556: I tried using the method from the last problem, but I'm still coming up with the wrong answer. Change the expression to an expression involving sines and cosines and simplify: 5cos(x)cot(x)+5sin(x) Click here to see answer by mananth(12270)

 Question 348596: 21cos(x) + 20 sin(x) can be written in the form Asin(x+ b) where A>0 and -pi < b < pi Thanks already! Click here to see answer by Edwin McCravy(8909)