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What will cos(x) return?

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in C by (52.2k points)
What will cos(x) return?

(a) sine of x where x is in radians

(b) sine of x where x is in degree

(c) cosine of x where x is in radians

(d) cosine of x where x is in degree

This question was posed to me in my homework.

Query is from Mathematical Functions topic in portion Input and Output in C of C

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The correct answer is (c) cosine of x where x is in radians

For explanation: None.

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