SOLUTION: csc (-x)+ sin x = (cos ^2x)csc (-x)
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Question 1124568
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csc (-x)+ sin x = (cos ^2x)csc (-x)
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Boreal(15235)
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cos^2 x*csc(-x)=(1-sin^2 x)*(-1/sin x)=(-1+sin^2 x)/sin x=(-1/sin x)+sin x=-csc(x)+ sin x=csc (-x)+ sin x, since the sine is an odd function