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20. Prove the identity:

Asked by 15th February 2009, 12:41 PM
Answered by Expert
Answer:

The R.H.S. if simplified becomes  equal to      secA + tan A.

This is the hint to us that we must convert the LHS also to secA and tanA .

So  this is how we'll do it.

Divide the LHS numerator and denominator by cos A

So,

 LHS

=

=RHS

Answered by Expert 16th February 2009, 11:17 AM
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