sin(3pi/12)cos(pi/12)+cos(3pi/4)sin(pi/12) I tried it like this sqrt2/2 (sqrt2/4+sqrt6/4)+(-sqrt2/2+? I'm not sure if how to approach it
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Originally Posted by LAPOSH42 sin(3pi/12)cos(pi/12)+cos(3pi/4)sin(pi/12) And
sin(3pi/12) = sin(pi/4) and cos(3pi/4) = -cos(pi/4) so your expression becomes sin(pi/4)cos(pi/12) - cos(pi/4)sin(pi/12) = sin[(pi/4) - (pi/12)] => sin(pi/6)
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