exam question sinewaves/electricity

Hey all. New here. I'm learning all things electrically related this year and need help. Here is a question that stumps me.
*if the maximum voltage of a sine wave is 29 volts, what is the value of the generated sine wave at 15 degrees?
They provide a graph noting that the sine value for 15 degrees is 0.2588

How do I approach a problem like this? The book has no examples.
Thanks!

Hi,

The voltage is the peak voltage times the sin of the angle:
v=Vpk*sin(angle)

If your angle is in degrees make sure your calculator is set for degrees too.

Vpk*(sin)=V
29*15deg=7.5 volts

Thanks sooo much. I will be on here with more I'm sure. Hopefully in the future I will be able to understand all this and put it to good use.