review_angle

review_angle - 6 = 30 ◦ π 4 = 45 ◦ π 3 = 60 ◦ and...

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Special Angles on a Unit Circle Instructor: Ms. Hoa Nguyen ([email protected]) Special angles between 0 and π 2 together with their sine and cosine are displayed on a 1st quadrant of a unit circle. The x -axis can be thought as the cosine axis while the y -axis can be thought as the sine axis. Since π = 180 , we have π
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Unformatted text preview: 6 = 30 ◦ , π 4 = 45 ◦ , π 3 = 60 ◦ and π 2 = 90 ◦ . Question : What is arcsin 1 2 ? Answer : Suppose arcsin 1 2 = α ⇒ sin α = 1 2 (arcsin is the inverse function of sin) ⇒ α = π 6 (refer to the above picture). Here, we assume that the angle α is in the 1st quadrant. 1...
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This note was uploaded on 05/23/2011 for the course MAC 2311 taught by Professor Noohi during the Fall '08 term at FSU.

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