1. Standards
MGSE9-12.G.SRT.6 Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle, leading to definitions of trigonometric ratios for acute angles.

2. Use Trig Ratios to help us find measurements of sides of triangles.
Learning Target
Use Trig Ratios to help us find measurements of sides of triangles.

3. Quick Vocabulary
Trigonometry: A branch of mathematics that deals with the relationships between the sides and angles of triangles and the calculations based on these relationships.
A Trigonometric ratio: A ratio of the lengths of the two sides in a right Triangle.
Complementary Angles: The sum of their measures is ________.

4. SOH – CAH - TOA

5. Model Problem 1 ) Identify The side adjacent, opposite to angle x and the hypotenuse
Adjacent to x :
Opposite X :
Hypotenuse : A B C

6. Model Problem 2) What is sin( k ) , cos( k ) and tan(k )?

7. Need more help? Sine video
trigonometry/trigonometric-ratios-sine/
Cosine video
trigonometry/trigonometric-ratios-cosine/
Tangent video
trigonometry/trigonometric-ratios-tangent/