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Step-by-step explanation:
Solve similarly to above or:
Divide both sides of the identity sin2(x) + cos2(x) = 1 by sin2(x) to get
sin2(x)/sin2(x) + cos2(x)/sin2(x) = 1/sin2(x)
Thus 1 + cot2(x) = csc2(x).
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