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If sinA=cosA then find tan2A

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Given: sin A = cos A

To find:  an 2A

Solution:

 sin 45^circ=cos 45^circ=frac1sqrt2

This implies A=45^circ

an 2A= an 2 imes 45^circ\ = an 90^circ\ =infty

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Deependra Verma

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