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2sin²b+4cos(a+b)sina sinb+cos2(a+b)=cos2a

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2sin²b+4cos(a+b)sina sinb+cos2(a+b)=cos2a

    • Posted by Ritika Kumari 6 years, 2 months ago

    CBSE > Class 11 > Mathematics
    • 2 answers

    Rahul Kumar Rk 6 years, 2 months ago

    but how to explain tell me

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    Rahul Kumar Rk 6 years, 2 months ago

    1 have answer

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