Posted by **Jack** on Saturday, September 11, 2010 at 10:59pm.

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

please explain why the answer is as it is, I dont understand this at all, please help :)

- Pre Calculus -
**drwls**, Sunday, September 12, 2010 at 7:16am
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

## Answer this Question

## Related Questions

- economics - After an unexpected increase in the price of oil, the long run ...
- Economics - In the short run, if the Reserve bank decreases interest rates, then...
- Chem - Consider the exothermic reaction CoCl42-(aq) + 6 H2O(l) --> Co(H2O)62...
- Chemistry - What happens to these physical properties as the strength of ...
- physics - A variable capacitor is connected to an ac source. what effect does ...
- calculus - The graph of f'(x) is shown for 0=< x =<10. The areas of the ...
- physics - A variable capacitor is connected to an ac source. what effect does ...
- science - Wax is coated on the inner wall of a capillary tube and the tube is ...
- Statistics - As x increases, does the value of r imply that y should tend to ...
- Statistics - . As the sample size increases The confidence interval also ...