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Find the range of f(x)= 1+3cos2x.

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Find the range of f(x)= 1+3cos2x.
  • 2 answers

Nancy Kansal 5 years, 7 months ago

[-2 4]

Gaurav Seth 5 years, 7 months ago

Let Y = 1 + 3 cos 2x

Now We Know that Cos Function lies
between -1 to 1

So putting These Value We get

Maximum Value = 1 + 3*1 = 4
Minimum Value = 1 + 3*(-1)= -2

So the range of f(x) is [-2,4].

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