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If Cos A =2/5,find the value of 4+4 tan 2A |
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Answer» 4+4tan2a=4 (1+tan2a)=sec2a=1/cos2a=(1/2/5)2=(5/2)2=25/4 25 Find sin2A by identity sin2A=1-cos2A they find tan2A Consider angle A of ∆ABC, U WILL GET D ANSWER |
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