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8.3a/8.4a: Tangent, Sine, and Cosine Ratios
Tangent
Tangent:

opposite
tan A 
adjacent
Tangent
Find the tangent ratios for J and K .


Find the tangent ratios for T and U .


Tangent
The following triangles are similar.
2
23.5°
4.6
1.5
23.5°
3.45
Tangent
Find the value of w to the nearest tenth.
1)
2)

3)

Sine/Cosine
Sine: sin A 
opposite
hypotenuse
Cosine: cos A 
SOHCAHTOA


adjacent
hypotenuse
Sine/Cosine
Use the triangle at the right to find the following. Leave
answer in simplest radical form or as a reduced fraction.
1) sin M
2) cos M
3) sin L
4) cos L
Your Turn!
Use the triangle at the right to find the following.
1) sin T
2) cos T
3) sin G
4) cos G
Trig
Find the value of x to the nearest tenth.
1)
14
2)
x
53° 
3)
8.4
6.3
40°
x

60°
x
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8.3a/8.4a: Tangent, Sine,
and Cosine Ratios
Homework:
p.434 #2-10 even
p.441 #2-10 even