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trigonometry math
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trigonometry math Questions and Answers
how to write cos 2x in terms of cos x?
find the angle x if tan^2 x-4sec x+5=0?
What are the zeros of the function f(x)=sinx+cosx found in interval (0,pi)?
Verify if sin25+sin35=cos5
What is the value of expression cos^2(x-y)+cos^2(x+y)-cos2x*cos2y?
Prove that cos x+sinx /cosx-sinx equal to 1+sin2x/cos2x
Calculate sin2a if sina+cosa=1/3
A triangular plot has a frontage on the sea of 100 yards. The boundary lines running from the beach make angles of 60 degrees and 50 degrees respectively on the inner side of the lot in line with the shore line. Determine the distance of the dividing line from the vertex of the triangle to the opposite side along the shore line to divide the lots into equal parts.
I wish to prove cos^2x-sin^2x=2cos^2x-1.
Prove that : sin 3a+sin a+sin 5a/cos 3a+cos a+cos 5a=tan 3a
Evaluate the trigonometric sum sin(pi/3)+sin(2pi/3)+sin(3pi/3)+sin(4pi/3) .
Find solutions of the trigonometric equation sin 12x+cos 6x=0?
Solve for x the following 3cos(3x-1)=0.
equation . Find x if sin^2x=1/4 .
prove tan(a+b)=(tan a+tanb)/(1-tana*tanb)
Derive tan(a+b), using sin (a +b) and cos(a +b).
Determine the trigonometric form of z=-2i.
I need to find the solution of equation sin^3x*sin3x+cos^3x*cos3x=0
show that cos3B+cosB=2(cos2B)cosb.
Find the number of the solutions of equation 99sin^2x-101=-sin^2x.
What is cos x if tan x=6/11?Solve using right triangle
Determine the values of x, 0<x<2pi, if the identity is true: cos^6 x=1-sin^6 x
What is sin(x+y) if sinx+cosy=1/4 and cos x+siny=1/2 ?
trigonometry Prove that cos2x(1 + tanx*tan2x) = 1
Find all solutions of the equation in the range [0;pi] . Identify solutions of the equation in [0;pi] . 1 + cosx + cos2x = 0
Simplify the fraction [cosx*sin(2x)-2sinx]/sin^2 x*cosx=?
Prove that (sin x)^2*[1 + (cot x)^2] = 1
Solve the equation if x is in interval (0;2pi) cos3x=cosx
Solve for x in (0 ; 360) : 2 tan x - 1 = -tan (-x).
solve the equation (sin B)^2- 3sin B +2 =0 where 0 ≤ B ≤ 2π
What is the solution of the equation 2six*sin3x-cos4x=0?
What is t if identity cos2x+2sin^2 (x)+t=0 is true?
Verify the identity 1+sinx=cos(90-x)+ cot45
Given the right triangle ABC, where A=90 degrees, calculate the expression: E=cosB/sinC+ cosC/sinB
If the identity 1-2sin^2a=2cos^2a+m is true, what is m?
What is the sum of functions sin 135+cos150? please explain the sum
What is x if 100sinx-99cosx=0?
Prove the following identity: (sqrt (1 - (cos^2 ) t ) * sqrt ((sec^2) t - 1)) / cos t = (tan^2) t
Prove the following identity: (tan^4) t + (tan^2) t + 1 = (1 - (sin^2) t * (cos^2) t) / (cos^4) t
Prove the following identity: (csc^2) x = (2 sec 2x) / (sec 2x - 1)
Given sinx=1/4 and cosx=3/4 what is sec2x ?
Find the exact solutions of the equation cos 2a=square root(1-sin^2 a), 0<a<180.
What is tan(pi/ 7) + cot(pi/2 - pi/6) / (1+ tan(-pi/7)*tan(pi/6))
cos problem Given sinx/cosx=2 determine cos^2x.
Prove AB^2+AC^2=2BM^2+2AM^2 for the diagram at http://i.imgur.com/hOYs3.jpg
Verify the inequality : sinx<1/2cosx.