Q.
The value of 3cosec20∘−sec20∘ is equal to
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answer is 4.
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Detailed Solution
We have, 3 cosec20∘−sec20∘=tan60∘cosec20∘−sec20∘=sin60∘cos20∘−cos60∘sin20∘cos60∘sin20∘cos20∘=sin40∘cos60∘sin20∘cos20∘=2sin20∘cos20∘1=4
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