Trigonometry: Basic problems help?

Posted on 2014-12-03 06:36:00 in Math by KENTA

1.) Find the radius of a circle if the sector is 38 deg and has area of 7ft^2.

2.) Find the angle that the straight line 3x - y +2 = 0 forms with the positive part of the x axis. Answer in degrees form.

3.) An object is traveling on a circular path with radius 12 m. It completes 5 cycles in every minute. Find the speed of the object. Express your answer in meter per second.

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