provs the identity (1+cosec theta) (1-sin theta )=cos theta * cot theta
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(1+1/sin theta)(1-sin thete)
(sin theta+1)(1-sin theta)
1=(cos thete× cot theta)
1=1
(1+1/sin theta)(1-sin thete)
(sin theta+1)(1-sin theta)
1=(cos thete× cot theta)
1=1
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