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MPM 2D Solving Right Triangles using Trig. Ratios SOH CAH TOA 1. Review: For any right triangle with an acute angle θ, the three basic trig. ratios are: sin θ = θ cos θ = tan θ = 2. Using your calculator solve for the unknown angle. a) sin A = 0.75 b) cos B = 0.5 c) tan θ = 3.4 "What is the angle whose sine is 0.75?" 3. Solve each of the following triangles for the unknown value. a) b) x 9 40o 7 cm 20 θ Since we need (H) and we know the value of (O), use sinθ. . We know (A) and (H) therefore use cosθ. Trigonometry Worksheet 1 Right Triangle Trigonometry Solve each of the triangles for the missing side(s) or angle(s). Round to one decimal where necessary. 1. 2. 4. 7. Homework: 1. Complete the worksheets. 2. page 348 #1(c), 2(c) 3. 5. 6. 8.