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Cos-1(3/5Cosx+4/5Sinx)

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Cos-1(3/5Cosx+4/5Sinx)

    • Posted by Anchal Yadav 6 years, 6 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Dinesh D 6 years, 6 months ago

    Let cos w= 3/5, so sin w=4/5, put in question to get cos-1(cosw.cosx+sinw.sinx). Inside bracket, we get cos(w-x). So after solving inverse, answer is w-x. Put value of w as cos-1(3/5) OR sin-1(4/5).

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