Sarah Fuller

A rear windshield wiper on a car has a total arm length of 10 inches and rotates back and forth through an angle of 95 degrees. The actual wiper blade is 7 inches long. Find the area of thr windshield that is being cleaned.

Verify the identity: sin(x+y)/cos(x-y)=cotx+coty/1+cotxcoty

prove: sin(a+b)/cosacosb=tana+tanb

prove: sin*2x+tan*2x+cos*2x=sec*2x

prove: 1+cosx/1-cosx-1-cosx/1+cosx=4cotxcscx

prove: cscxcos*2x+sinx=cscx

prove: cos*2x=csc*2x-2/csc*2x