Consider the cosine of any angle between 35° and 40°. If the angle were doubled, what would happen to the cosine of the angle.

A. It would halve.

B. It would decrease to less than half its original value.

C. It would decrease but be more than half its original value.

D. In different cases, it could do any of the above.

The answer is :

B. It would decrease to less than half its original value.

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