The length of a bicycle pedal arm is 0.152 m, and a downward force of 146 N is applied to the pedal by the rider's foot. What is the magnitude of the torque about the pedal arm's pivot point when the arm makes the following angles with the vertical?

Question

The length of a bicycle pedal arm is 0.152 m, and a downward force of 146 N is applied to the pedal by the rider's foot. What is the magnitude of the torque about the pedal arm's pivot point when the arm makes the following angles with the vertical? 
(a) 30° 
(b) 90° 
(c) 180°

And what is your thinking. Providing answers to questions is not in my opinion very helpful to you in the long run. I will gladly critique your thinking. Thinking is NOT "I think the answer is ..." unless you say " because..."

Thanks.

I figured it out. T=r*F*sin theta. Thanks. Please help me out on my problem posted above.