Question

prov that cot^2a-1/sin^2a=1
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Answer 1

Answer:

answer for the given problem is given

Answer 2

Step-by-step explanation:

$\sf{we\:know\:that\:cot^2a = \frac{cos^2a}{sin^2a}}\\\sf{ \frac{cos^2}{sin^2} - \frac{1}{sin^2} = \frac{cos^2 - 1}{sin^2} }\\\sf{cos^2 = 1 - sin^2a\rightarrow \sf{ \frac{(1 -sin^2) - 1 }{sin^2 } = - 1 }}$