Evaluate the expression without using a calculator. (Assume the variable represents a positive number.) cos(2 cos(5x)) O 51x2-1 O 50x2+1 48x2- 1 50x2-1 O 51x²+1

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A: -3/2 lies outside the domain of the function. Hence we will have no solution

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A:

Q: +COSO |-COSO %3D 1+COS O

A:

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A: Using Cos(A+B) formula

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A:

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