Hi there Ive been trying out this identity; Prove: Sinē Θ =1/2 (1- Cos 2Θ) I got to Sinē Θ = 1-Cos 2Θ/ 2 but i am unsure about what to do to get out of the next problem, can you cancel the 2??? Could you show how you continue?
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Hello, madmax29! This is one of the basic trig identities. What facts and identities are we allowed to use? Prove: . The right side is: . .[1] If we are allowed the identity: . . . then we have: . Since , we have: . Substitute into [1]: .
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