Math, asked by debnathdipak760, 1 month ago

(iii) 2 cos2 A - 1 = 1 - 2 sin2A​

Answers

Answered by suhail2070
0

Step-by-step explanation:

2 { \cos( \alpha ) }^{2}  - 1 = 2( { 1 - \sin( \alpha ) }^{2} ) - 1 \\  = 2 - 2 { \sin( \alpha ) }^{2}  - 1 \\  = 1 - 2 { \sin( \alpha ) }^{2}

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