Questions on Algebra: Trigonometry answered by real tutors!

Tutors Answer Your Questions about Trigonometry-basics (FREE)

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 343323: 150 is what percent of 750?

Click here to see answer by unlockmath(1599)

Question 343508: please help me solve this equation x(x+7)-2=28
Click here to see answer by ewatrrr(10682)

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 343923: How would you solve
330 cos 27(degrees)
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 343990: Simplify: -5(cot^2 (theta) - csc^2 (theta))
Click here to see answer by stanbon(57347)

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 344068: Solve for Y : 9x-6xy=30
Click here to see answer by Fombitz(13828)

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 346074: Find sin(sin^-1(1/4))
Click here to see answer by stanbon(57347)

Question 346074: Find sin(sin^-1(1/4))
Click here to see answer by jsmallt9(3296)

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 346373: y=sin 2 (x+90 degrees)
Click here to see answer by nyc_function(2733)

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 348253: What is the exact value of sin((5pi)/3)
Thanks in advance
Click here to see answer by checkley77(12569)

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)

Question 348739: when cos(x)= -(0.25)(7^1/2) what is the value of sin(x)
Thanks in advance
Click here to see answer by Fombitz(13828)

Question 348766: Find the amplitude and period of y = –2 sin (4x).
Click here to see answer by stanbon(57347)

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