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2tan^-1(cosx)=tan^-1[(2cosx)/1-cos^2x] Proof

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2tan^-1(cosx)=tan^-1[(2cosx)/1-cos^2x] Proof

    • Posted by Harpal Singh 4 years, 2 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Shubham Mishra 4 years, 2 months ago

    LHS 2tan^-1(cosx) =tan^-1(cosx) + tan^-1(cosx) =tan^-1{(cosx+cosx)/1-cosxcosx)} =tan^-1{(2cosx)/1-cos^2x}

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