Trig. Ratios
trig ratio: ratio comparing the side lengths of a right triangle
A
SOH
sin A = opp.
hyp
CAH
TOA
cos A = adj.
hyp
tan A = opp
adj
Find the sine, cosine, and tangent of
B
3
4
A
A and
B.
sin A =
sin B =
cos A =
cos B =
tan A =
tan B =
Use a calculator:
sin 82
= ________________
cos 82 = ________________
tan 82
= ________________
Find the missing length.
Round to the nearest hundredth.
15
18
x
8
m
27
o
38
w
o
49
You are measuring the height of a building. You stand 100 ft. from
the base of the bldg. You measure the angle of elevation from a
point on the ground to the top of the bldg. to be 48 o . Estimate the
height of the bldg.
From the top of a vertical cliff 40 meters high, the angle
of depression of an object that is level with the base of
o
the cliff is 34 . How far is the object from the base of
the cliff?