verify that cscx / (cotx + tanx ) = cos x?

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  • 1 decade ago
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    cscx / (cotx + tanx )

    = csec x /( 1/tan x + tan x)

    = csc x / ((1+ tan ^2 x)/tan x)

    = csc x tan x / (sec ^2 x)

    = (1/sin x) (sin x/cos x) cos ^2 x

    = cos ^2 x/ cos x

    = cos x

    proved by math kp

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  • Anonymous
    1 decade ago

    yeah looks good 2 me.

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