# Pre Calculus

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As x increases from p/4 to 3p/2, the value of sin(x) :

A.increases throughout the interval
B.decreases at first, then increases
C.increases at first, then decreases
D.decreases throughout the interval
E.none of the above

• Pre Calculus -

This only makes sense if your "p" is pi, and x is an angle expressed in radians.

The sin of pi/4 is 0.7071
Then sin x rises to +1 at x = pi/2, and falls to -1 at x = 3 pi/2

The correct answer is therefore C

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