Posted by Britt on Tuesday, December 20, 2011 at 7:20pm.
sin a cos b + cos a sin b = sin (a+b)
so sin (7t)
1/(1/cos x -1) - 1/(cos x +1)
cos x/(1 - cos x) - cos x/(1+cos x)
[cos x(1+cos x) - cos x(1-cos x)]/(1-cos^2 x)
[ cos x + cos^2x - cos x +cos^2 x]/sin^2x
2 cos^2 x/sin^2 x
2 cot^2 x
Related Questions
trigonometry - Use identities to simplify each expression. 1) (sin2t) (cos5t...
Math - Trigonometry - Verify the following: 1. cos x/(1-sinx)= sec x + tan x 2...
calculus - need help simplifying some trig identities such as: (csc t) (sin t) ...
trigonometry repost - Reduce (csc^2 x - sec^2 X) to an expression containing ...
trigonometry - {1/(sec x - 1)} - {1/(sec x +1)} = 2 cot^2 x solve using ...
Integration - Intergrate ¡ì sec^3(x) dx could anybody please check ...
trigonometry - 1) show that: 1-cos2t divided by sin2t= TANt 2) show that: 1-(...
Math - Prove Trig. Identities 1. sec è (sec è - cos è)= tan...
Math - Trig - I'm trying to verify these trigonometric identities. 1. 1 / [...
trig - verify : [sec(x) / csc(x) - cot(x)] - [sec(x) / csc(x) + cot(x)] = 2csc(x...
For Further Reading
