can someone help me here? i know these are simple but i can't get it. Find sin(x/2) when cos(x)=3/7. and find cos(x/2) when sin(x)=5/12
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Originally Posted by jarny can someone help me here? i know these are simple but i can't get it. Find sin(x/2) when cos(x)=3/7. and find cos(x/2) when sin(x)=5/12 use the half-angle formulas: and also, will come in handy for the second one
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