English, asked by prmodtirkey2, 4 months ago

course but are 1 - sin + cos but 1 - sin barabar 4

Answers

Answered by itzBrainlymaster

1

Answer:

LHS= 1−sinAcosA + 1+sinAcosA = (1−sin 2 A)cosA(1+sinA+1−sinA) =cos 2 A2cosA= cosA2=2secA=RHS

Hence proved.

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