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MPM 2DI Unit 7 Day 10 -1- Solving Problems using Trigonometry Recall Example 1 A ramp is 14m long, and the difference between the higher end and the lower end of the ramp is 2m. What is the angle of elevation of the top of the ramp? MPM 2DI Unit 7 Day 10 -2- Example 2 In an isosceles triangle, the altitude is 10.5 cm and the angle between the equal sides is 43 . What are the perimeter and the area of the triangle to the nearest 0.1 cm? Example 3 From the top of a lighthouse the angle of depression of the water level on a nearby dock is 34 at low tide and 30 at high tide. If the observer is 20 m above the water at low tide, what is the difference in levels between high and low tide?