prove that: 1. 2. please help...
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What have you tried to this point? I suggest thinking about some double angle formulas for the first question.
i tried using the double angle formulas but dont know how to bring about the cot(A/2) for the first one .
For the first one I think it can be useful to work with the identities:
i did the fiirst one. what about the second one??
Originally Posted by earthboy prove that: 2. please help... Use your double angle identities for sin(A) and cos(A) noting that Since you want cot then you want to get cos(A/2) in the numerator rather than sin(A/2)
Hello, earthboy! Right side: . Multiply by . . . . . . . . . . . .
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