Question

2 versin A+cos² A=1+versin² A

Answer 1

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Step-by-step explanation:

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LHS:

2versinA+cos2A

=2⋅2cosA+cos2A

=1+1⋅2cosA+cos2A

=1+(1−cosA)2

=1+versin2A

:RHS

Hence proved.