Posted by **Courtney** on Tuesday, November 20, 2012 at 4:12pm.

Evaluate the trigonometric functions by memory or by contruscting appropriate triangles for the given special angles.

(a) csc 30deg

(b) sin pi/4

- Pre-calc -
**Reiny**, Tuesday, November 20, 2012 at 4:33pm
Somewhere in your notes or your textbook you should have diagrams of the 30-60-90 and the 45-45-90 right-angled triangles and their sides.

remember csc30° = 1/sin30° , which you should know

and π/4 =45°, and you should know that as well

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