Five mark exercise problems VI — task. Mathematics State Board, Class 10.

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Prove the following identites.

(i)

$\frac{sin \ A - sin \ B}{cos \ A + cos \ B} + \frac{cos \ A - cos \ B}{sin \ A + sin \ B} = 0$

(ii)

$\frac{sin^3 \ A + cos^3 \ A}{sin \ A + cos \ A} + \frac{sin^3 \ A - cos^3 \ A}{sin \ A - cos \ A} = 2$

Important!

This is a self-assessment task. Solve this question and assess the solution steps after completing the test on your own.

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40. Five mark exercise problems VI