Trig assignment
Show all work for full credit BERMAN Name ____________________ Worksheet 9 – Due ___________________ Show all work and use appropriate units for full credit. 1. Solve each equation, symbolically: a. 22cos sin 1x x , all real x b. 4 cos(3?) + 3.5 = 0, first four where ? > 0 2. Solve each equation or inequality, graphically, over the indicated interval. Include a sketch that supports your conclusion a. 2sin sin 2 1x x , 0 2x b. 5cos 2x x 3. Solve each triangle, approximating all angle to one decimal place and sides to two decimal places. Refer to the diagram below a. 21.5 , 72.3 , 12.45b c a b ? b. 33, 67, 45a b c c. 62, 100, 32a b d. 82.0, 147, 98.2a c 4. An airplane is sighted (simultaneously) between two observers 6 miles apart. The angles of elevation of the plane as seen by the two observers are 20.2 and 16.7 . Determine the height of the plane. c a b ? c a b ? c a b ? Show all work for full credit BERMAN Name ____________________ Worksheet 9 – Due ___________________ Show all work and use appropriate units for full credit. 1. Solve each equation, symbolically: a. 22cos sin 1x x , all real x b. 4 cos(3?) + 3.5 = 0, first four where ? > 0 2. Solve each equation or inequality, graphically, over the indicated interval. Include a sketch that supports your conclusion a. 2sin sin 2 1x x , 0 2x b. 5cos 2x x 3. Solve each triangle, approximating all angle to one decimal place and sides to two decimal places. Refer to the diagram below a. 21.5 , 72.3 , 12.45b c a b ? b. 33, 67, 45a b c c. 62, 100, 32a b d. 82.0, 147, 98.2a c 4. An airplane is sighted (simultaneously) between two observers 6 miles apart. The angles of elevation of the plane as seen by the two observers are 20.2 and 16.7 . Determine the height of the plane. c a b ? c a b ? c a b ?