anonymous
  • anonymous
Can anyone help me with this trigonometry questions????? find the maximum value of 2 sin x - cos x.i will give you a medal....
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
the question is in the picture form
dan815
  • dan815
2 sin x - cos x = R cos(x+a) this looks like fun
dan815
  • dan815
any idea to show how this is true

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anonymous
  • anonymous
yup and confusing....
dan815
  • dan815
cos(x + y) = cos x cosy - sin x sin y
dan815
  • dan815
2 sin x = 2*cos(x-pi/2)
dan815
  • dan815
use that identity above to rewrite this expression

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