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  • 04-06-2018
  • Mathematics
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Find the exact value of sin(11pi/12)cos(pi/6)-cos(11pi/12)sin(pi/6)

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Аноним Аноним
  • 04-06-2018
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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