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**musicismylife2007** 1.Express the radian measure of each angle in an equilateral triangle in exact form and in approximate form to the nearest hundredth.

2. a) though how many radians does the earth turn on its axis in a leap year? express your answer in exact form.

b) How many hours does it take the earth to rotate through an angle of 150 degrees?

c) How many hours does it take the earth to rotate through and angle of 7/3 pi rad.

3. Express the angle that the second hand on a watch turns through in 1s

a) in degree measure

b) in radians measure in exact form and in approximate form, to the nearest radian.

Thanks so much.