91.notebook
1
November 19, 2010
Apr 181:44 PM
91 Solving right triangles
A
B
C
opposite
hypotenuse
adjacent
sin
θ
= opposite/hypotenuse
cos
θ
= adjacent/hypotenuse
tan
θ
= opposite/adjacent
Apr 181:56 PM
Ex 1
. For the right triangle ABC
shown, find value of b to the nearest
tenth of a degree.
a
b
c = 40
A
B
C
28
0
H.W. p. 333 16
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91.notebook
2
November 19, 2010
Apr 182:04 PM
Ex. 2
The safety instructions for a 20 ft. ladder
indicate that the ladder should not be inclined at more
than a 70
0
angle with the ground. Suppose the ladder
is leaned against a house at this angle, as shown. Find
a) the distance x from the base of the house to the foot
of the ladder and b) the height, y reached by the
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 Winter '07
 Owens
 Trigonometry, Angles, H.W. p.

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