Q.

Difference between maximum and minimum values of θ satisfying the equation sin4θ+cos7θ=1  in the interval (−π,π)  is:

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a

π

b

π/2

c

π/4

d

None

answer is A.

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Detailed Solution

If cosx≠1,sin2x≠1 . Then, cos7x
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Difference between maximum and minimum values of θ satisfying the equation sin4θ+cos7θ=1  in the interval (−π,π)  is: