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Section 5.1 Special Right Triangles. 45° – 45° – 90 °. 1. 1. 45° – 45° – 90 °. 3. 3. 45° – 45° – 90 °. 5. 30° – 60° – 90 °. 2. 2. 2. 1. 30° – 60° – 90 °. 2. 8. 1. 4. 30° – 60° – 90 °. 2. 1. 6. 3. #1. Find x and y. Page 155. #2. Find x and y. Page 155.
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45° – 45° – 90° 1 1
45° – 45° – 90° 3 3
30° – 60° – 90° 2 2 2 1
30° – 60° – 90° 2 8 1 4
30° – 60° – 90° 2 1 6 3
sin θ and cosθ Hyp Opp θ Adj
What is the “co” for in cosine? c c β a a θ b b = The functions sine and cosine have the same value when the angles are complementary.
2. Solo QuizFind x and y in each problem. 1. 4. 3.