Mathematics- Special Angles in Circles in a Coordinate System, May 4, 2009

Today, we discussed the derivations for special angles within a unit circle on the Cartesian plane. The special angles we found were:

cos( π/4) = √2/2

sin ( π/4) = √2/2

cos ( π/6) = √3/2

sin ( π/6) = 1/2

cos ( π/3) = 1/2

sin ( π/3) = √3/2

We can use these angles to help us solve for the coordinates of some point P on the circle.

For homework, please complete #1, 2, 3, 6, 8, 10a and 11 of page 188 in the Alberta Mathematics 12 text (red book). This homework is due for Thursday, May 7, 2009.

Mathematics 12- pg. 188

Pg. 188- Answers

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