Download Day 10 – Solving problems(3)

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?