2. Exact Values of Sines, Cosines, and Tangents

3.  None

4.  45-45-90  30-60-90 1 1

5. Sine = vertical side of triangle length Cosine = horizontal side of triangle length Tangent = sine / cosine

6. Draw a 45 degree angle in the 1 st quadrant Make a right triangle out of it Notice the hypotenuse of triangle is 1 Use the special triangles to solve for sine and cosine Use sine and cosine to solve for tangent

7. Draw a 30 degree angle in the first quadrant Make a right triangle Notice the hypotenuse is 1 Use special triangles to solve for sine and cosine Use sine a cosine to solve for tangent

8. Draw a 60 degree angle in the first quadrant Make a right triangle Notice the hypotenuse is 1 Use special triangles to solve for sine and cosine Use sine and cosine to solve for tangent

9.  Use definitions and properties of sines, cosines, and tangents from lesson 4-4. Opposites Theorem Supplements Theorem Complements Theorem Half-Turn Theorem

10. Angle in RadiansSineCosine 001 π/6π/6 1/21/2 √3 / 2 π/4π/4 √2 / 2 π/3π/3 √3 / 2 1/21/2 π/2π/2 10

11. 1.Cos ( -2 π / 3 ) 2.Sin 45 ° 3.Cos 210° 4.Sin ( 17 π / 6 )

16.  Worksheet 4-5