Monday

September 22, 2014

September 22, 2014

Posted by **Britt** on Tuesday, December 20, 2011 at 8:40pm.

solve using identities?

- trigonometry -
**Damon**, Tuesday, December 20, 2011 at 8:41pmHey, I did this for you long ago.

- trigonometry -
**Damon**, Tuesday, December 20, 2011 at 8:41pmTwice in fact

- trigonometry -
**Damon**, Tuesday, December 20, 2011 at 8:42pmcopy again

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

- trigonometry -
**Britt**, Tuesday, December 20, 2011 at 8:43pmohh, i didnt realize! thankyou :)

- trigonometry -
**Damon**, Tuesday, December 20, 2011 at 8:44pmPlease check before repeating posts. Some other teacher might have done it all over again.

- trigonometry -
**Britt**, Tuesday, December 20, 2011 at 8:56pmokay!

**Answer this Question**

**Related Questions**

trigonometry - Use identities to simplify each expression. 1) (sin2t) (cos5t...

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

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

Trigonometry - Verify/Solve the identities. 1.) SIN^1/2 X COS X-SIN^5/2 X COS X ...

Math - Prove Trig. Identities 1. sec è (sec è - cos è)= tan^2 è 2. tan^2 è (1 + ...

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

Trigonometry - Verify the identities. 1.) SIN[(π/2)-X]/COS[(π/2)-X]=...

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

Math - Trig - I'm trying to verify these trigonometric identities. 1. 1 / [sec(x...

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