Q.
The value of cosecπ18−4sin7π18 is
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answer is 2.
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Detailed Solution
cosec10∘−4sin70∘=1−4sin70∘ sin10∘sin10∘=1−2cos60∘−cos80∘sin10∘=1−212−sin10∘sin10∘=1−1+2sin10∘sin10∘=2
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