Tuesday

November 25, 2014

November 25, 2014

Posted by **Urgh** on Thursday, September 20, 2007 at 12:51am.

(1 - cos^2 0)(1 + cot^2 0) = 1

No idea!

- Trigonometry -
**drwls**, Thursday, September 20, 2007 at 2:02amLet's use x instead of 0 as the angle, to avoid cnfusion with the number zero.

Remember that 1 - cos^2 x = sin^2 x

Also sin^2 x *cot^2 x = sin^2*cos^2/sin^2 = cos^2 x

With those steps, and sin^2 x + cos^2 x = 1, you should be able to prove this identity.

**Answer this Question**

**Related Questions**

Trigonometry - Use the properties of logarithms and trigonometric identities to ...

trigonometry........... - Prove the following identity:- (i) tan^3x/1+tan^2x + ...

trig - Establish the trigonometric identity (Hint: Use sum to product) cos(5x)+...

Trigonometry - Please review and tell me if i did something wrong. Find the ...

trig - For each expression in column I, choose the expression from column II to ...

Pre-Calculus - I don't understand,please be clear! Prove that each equation is ...

Pre-Calculus - Prove that each equation is an identity. I tried to do the ...

trigonometry - I need help in understanding how to identify which identity to ...

Trigonometry need help!!! - need help don't understand how to do this.... 1....

Pre Cal - could someone please tell me what the other angle identity of tan is? ...