4 years ago

Find the exact value of sin(11pi/12)cos(pi/6)-cos(11pi/12)sin(pi/6)

1 answer:

6 0

We use the identity sin (A - B) = sin A cos B - cos B sin A

so the above = sin (11pi/12 - pi/6) = sin 3pi/4 = 1 / sqrt2 answer

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