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UNIT ONE: LESSON FOUR: Solving Problems Using Primary Trig Ratios Method: Use the sides/angles that are given and the side/angle you want to find to choose which trig ratio to use. Example 1: Find the length of x. 15 a) x 58° b) c) 40⁰x x x 48 cm 35⁰ 10 cm Example 2. Find the measure of both acute angles in the triangle below. (4 marks) X 37 12 Y Z 35 Recall: To SOLVE a triangle means to find all missing sides and angles. (Three items in total.) Example 3: Sketch the triangle and solve. Round to one decimal place, where required. ΔABC, <A=90°, <B=42°, and c=22 cm. Example 3: Two guy wires are attached to a flag pole as shown below. Find the distance between the two wires. x y 17° 43° 15 m Solution: Let the unknown lengths along the flagpole be “x” and “y.” Tan = ____________ Tan = _____________ Hw. P. 12-13 #1abc, 2cd, 3ab, 4, 5, 8, 9, 12