SOLUTION: Using the exact values of the sine and the cosine of 1/6 pie and 3/4 pie and one of the sum and difference formulas. show sin(7/12 pie)is 1/4(sqrt2 + sprt6)? i can work out the

Question 924794: Using the exact values of the sine and the cosine of 1/6 pie and 3/4 pie and one of the sum and difference formulas. show sin(7/12 pie)is 1/4(sqrt2 + sprt6)?
i can work out the sin(7/12pie)=sin(1/4pie+1/3pie)=sin(1/4pie)cos(1/3pie)+cos(1/4pie)sin(1/3pie)=1/2sprt2*1/2+1/2sprt2*1/2sprt3=1/4(sprt2+sprt6)
i do not understand using the exact values of sin and cosin of 1/6 pie and 3/4pie????
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
I'm not doing any more problems with pie.
It's the Greek letter, pi.

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