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If tan theta =(a)/(b) prove that a si...

If tan `theta =(a)/(b) ` prove that a sin `2theta + b` cos `2theta =b`

Text Solution

Verified by Experts

Use the relations
`" sin "2 theta =(2 tan theta)/((1+ tan^(2) theta)) " and cos " 2 theta =(1-tan^(2) theta)/(1+ tan^(2) theta)`
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