Hi, I seem to have forgotten much about trig. identities and so on. How did the authors reduce the following:
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The following two identities were used 2sin(x)cos(x) =sin(2x) sin^2(y) = (1-cos(2y))/2
Hello scorpion007 Originally Posted by scorpion007 Hi, I seem to have forgotten much about trig. identities and so on. How did the authors reduce the following: First, note the identity: and then the identity Grandad
Ah, thank you both very much for the explanation!
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