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January 26, 2015

January 26, 2015

Posted by **Alycia** on Tuesday, December 4, 2012 at 11:27pm.

- Trig -
**Reiny**, Tuesday, December 4, 2012 at 11:33pmWhat are we doing?

Solving ?

or

proving it is an identity?

BTW, you have to put the x for all the trig functions

that is,

cosx cotx = cscx - sinx

Let's see if it is an identity...

LS = cosx (cosx/sinx

= cos^2 x/sinx

RS = 1/sinx - sinx

= (1 - sin^2 x)/sin

= cos^2 x/sinx

= LS

ahh, it is an identity

- Trig -
**Mac**, Tuesday, December 4, 2012 at 11:35pmCos (cos/sin)= cos^2/sin = (1 - sin^2x)/sin

1/sin sin^2/sin = csc x sin x

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