ve the following (4- 11) identities:sind C – InterviewSolution

1.

ve the following (4- 11) identities:sind C

Answer»

a)

LHS:

sin^4 + cos^4 + 2sin^2cos^2 - 2sin^2cos^2Look at the first three terms, it is the square of sum so it becomes

(sin^2 + cos^2)^2 - 2sin^2cos^2

With Pythagorean theorem, sin^2 + cos^2 = 1therefore it becomes:

1 - 2sin^2cos^2

LHS = RHS

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