Saturday

September 20, 2014

September 20, 2014

Posted by **Help pleaseee** on Friday, October 7, 2011 at 9:32pm.

sins^2xcscx^2-sin^2x

sec^4x-tan^4x

- trig -
**Reiny**, Saturday, October 8, 2011 at 12:20amsins^2xcscx^2-sin^2x

= sin^2x(csc^2x - 1)

= sin^2x(cot^2x)

= sin^2x(cos^2x/sin^2x)

= cos^2x

sec^4x - tan^4x

= (sec^2x - tan^2x)(sec^2x + tan^2x)

= (tan^2x + 1 - tan^2x)(tan^2x + 1 + tan^2x)

= 1(2tan^2x +1)

= 2tan^2x + 1

- trig -
**Anonymous**, Saturday, October 8, 2011 at 8:03pmOHHH okay, THANKS!

**Answer this Question**

**Related Questions**

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

Math(Please check) - Use the fundamental identities to simplify the expression. ...

trig 26 - simplify to a constant or trig func. 1. sec Ču-tan Ču/cos Čv+sin Čv ...

Trig - Are any of these three problems identities? 1. Cos^2x-sin^2x=1-2sin^2x 2...

Trig - Are any of these three problems identities? 1. Cos^2x-sin^2x=1-2sin^2x 2...

trig - Use the fundamental identities to simplify the expression. cos^2θ/...

trig - how do you start this equation i've been tryng it for 20min. sec^6x(...

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

Trig Identities - Proving identities: 1) 1+ 1/tan^2x = 1/sin^2x 2) 2sin^2 x-1 = ...

Trigonometry - Use the trig Identities to find the other 5 trig functions. ...