You can put this solution on YOUR website! sin(π/2-x)cot(π/2+x)=-sinx
solve the left side to make it right.
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sin(π/2-x)cot(π/2+x)
sin(π/2-x)=ços x
cot(π/2+x)=cos(π/2+x)/sin(π/2+x)
cos(π/2+x)=(cos(π/2)cosx)-(sin(π/2)sinx)=-sin x
sin(π/2+x)=(sin(π/2)cosx)-(cos(π/2)sinx)]=cos x
(cos x)(-sin x/cos x)
=-sinx
left side = right side
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