Saturday

February 28, 2015

February 28, 2015

Posted by **Britt** on Tuesday, December 20, 2011 at 7:25pm.

1) (sin2t) (cos5t) + (cos2t) (sin5t)

2) {1/(sec x - 1)} - {1/(sec x +1)} = 2 cot^2 x

- trigonometry -
**Damon**, Tuesday, December 20, 2011 at 8:04pmsin 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

**Answer this Question**

**Related Questions**

trigonometry - 1) (sin2t) (cos5t) + (cos2t) (sin5t) 2) {1/(sec x - 1)} - {1/(...

math - use the quotient and reciprocal identities to simplify the given ...

Trigonometry - Simplify each expression using the fundamental identities. 1. Sec...

calculus - need help simplifying some trig identities such as: (csc t) (sin t) ...

trigonometry - {1/(sec x - 1)} - {1/(sec x +1)} = 2 cot^2 x solve using ...

trig - use basic identities to simplify the expression. csc θ cot θ / ...

Trig - Use the fundamental identities to simplify the expression: cot beta sec ...

Trigonometry - I don't understand how I'm supposed set the problem up or what ...

Math - Trigonometry - Verify the following: 1. cos x/(1-sinx)= sec x + tan x 2...

trigonometry repost - Reduce (csc^2 x - sec^2 X) to an expression containing ...