Simplify : sin theta{1/sin theta- 1/cosec theta}
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Sin theta( 1/ sin theta- 1/ 1/ sin theta)
sin theta( 1-sin square theta/sin theta)
NOW : note that
sin theta and sin theta would get cancelled.
So 1-sin theta
= cos theta
sin theta( 1-sin square theta/sin theta)
NOW : note that
sin theta and sin theta would get cancelled.
So 1-sin theta
= cos theta
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