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```					TF.01.2 - Problem Solving With Trigonometry

MCR3U - Santowski

1
(A) Review

   You have the three following formulas to work with:

   (i) SOHCAHTOA

   (ii) a/sinA = b/sinB = c/sinC

   (iii) a2 = b2 + c2 - 2bccosA

2
(B) Examples

   (i) Find the length of MN in the following diagram:

N

M
15

25
L                            K
7 cm                3
(C) Examples

   (i) Find the length of MN in the following diagram:

4
(C) Examples

   Mr Santowski is flying an airplane approaching the school, which he spots at
an angle of depression of 34 degrees. Mr. S. then flies 2.5 km on the same line
of flight and then, as he is flying away from the school, he turns around and
sees the school at an angle of depression of 18 degrees.

   Determine (i) the height of the plane and (ii) the ground distance from Mr. S.
to the school. Make the assumption that my elevation does no change during
my fly-by.

   Now repeat the question, with the new assumption that my elevation changes
by a glide:drop ratio of 13:1 over the 2.5 km of my fly-by

5
(D) Homework

   Nelson Text, p522, Q1-7,9-18, 20

6

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