Trig Q

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Ryltar

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Is it worth memorizing both the double angle formulas and the sum or difference of two angles formulas (e.g. sin(a+b) = sinacosb +cosasinb)
 
Is it worth memorizing both the double angle formulas and the sum or difference of two angles formulas (e.g. sin(a+b) = sinacosb +cosasinb)

Not sure, but I did anyway. Shouldn't take more than 10 minutes. Try to understand it, instead of just memorizing.
 
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