This is in the 2nd quadrant, so is -238 degrees

This is quadrant 3, so yest its tan.2) For -180< 0 < -90, which of the primary trigonometric function is positive in this interval?

A) Cos 0

b) Tan 0

c) Sin 0

My answer is B Tan 0

In radians this is 35/12 or in degrees 35/12*180/pi~=167 degrees.3) A central angle subtends an arc of 35cm. if the radius of the circle is 12 cm, what is the measure of the central angle to the nearest degree?

A. 2.9

B. 292

C. 167

D. 173

My answer is A 2.9

This looks OK, but I am suspicious of the appearence of pi^2 in this4) Are -5 (pi square) /9 and 5 (pi square) /9 coterminal angles?

My answer:

No they are not coterminal angles because it is not minuses or added by 360.

and the next question, also are they supposed to be in degrees or radians?

Not likely, also use more brackets to make this less ambiguous, and clarify5) what is the exact value of sin 5 (pi square) / 6?

The exact value is ½

the angle measure in use. As it is I would be supprised if it had an exact

value (in the sense intended in the question)

RonL