Question

Sin(90-x)cos(90-x)=tanx/1+cot^2(90-x)

Answer 1

hello there mate !

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ANSWER

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rewrite sec ( 90 - x ) in terms of sins cosines

$1\\___\\\\cos ( 90 -x )$

$sin ( 90 - x )$                 - sec ( x )

mulitply    $1\\    cos (90 - x) and$    $1\\sin ( 90 - x )$