Thursday

July 24, 2014

July 24, 2014

Posted by **rossi** on Friday, November 26, 2010 at 4:35pm.

a) cos^2 A - cos^2 B

b) tan^2 A - tan^2 B

c) tan^2 A - tan^2 B

d) sin^2 A - sin^2 B

please show the steps you take to get to the answer! thank you

- TRIG -
**Damon**, Friday, November 26, 2010 at 4:42pmsin (a+b) = sin a cos b + cos a sin b

sin (a-b) = sin a cos b - cos a sin b

product

sin^2 a cos^2 b - cos^2 a sin^2 b

now divide by cos^2 a cos^2 b

sin^2 a/cos^2a - sin^2 b/ cos^2 b

= tan^2 a - tan^2 b

**Related Questions**

Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...

precalculus - For each of the following determine whether or not it is an ...

Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...

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

Trigonometry desperate help, clueless girl here - 2. solve cos 2x-3sin x cos 2x...

Trigonometry - 1.Solve tan^2x + tan x – 1 = 0 for the principal value(s) to two ...

trig 26 - simplify to a constant or trig func. 1. sec ²u-tan ²u/cos ²v+sin ²v ...

Math - Prove each identity: a) 1-cos^2x=tan^2xcos^2x b) cos^2x + 2sin^2x-1 = sin...

math - Use the exact values of the sin, cos and tan of pi/3 and pi/6, and the ...

math - Use the exact values of the sin, cos and tan of pi/3 and pi/6, and the ...