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prove that 2 cosec 4 theta sec 2 theta=(1-tantheta/1+tantheta)cosec2theta
4 years ago

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oobleck
Plug in theta = pi/8 and see that this is not true.

Also, your formatting is ambiguous (meaning wrong). How about some parentheses to make it clear just how the right side is to be parsed?
4 years ago

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