MBF3C
Unit 1, Lesson 3
The Trigonometric Ratios (SOH CAH TOA)
1. Label the sides of the right triangle below (with respect to angle A). Copy down the formula
for the tangent ratio and two new ratios.
B
A
C
2. What does SOH CAH TOA stand for? How can it be useful?
2. Examine the triangle below. Label the sides.
15cm
h
31
a) Which trigonometric ratio could you use to solve for side h?
b) Solve for h.
MBF3C
Unit 1, Lesson 3
3. Examine the triangle below. Label the sides.
9.7cm
x
64
a) Which trigonometric ratio could you use to solve for side x?
b) Solve for x.
4. Solve for the unknown(s) value in each triangle below.
a)
49
z
b)
34 feet
b
12m
71
a
5. Draw triangle ABC, such that A = 90 , B = 43 and b = 3.8 cm. Find the length of side a.
MBF3C
Unit 1, Lesson 3