SOH-CAH-TOA
Identify the sides in relationship to angle A.
A
hypotenuse
?
adjacent
?
opposite
?
Identify the sides in relationship to angle A.
hypotenuse
?
opposite
?
adjacent
?
A
Sin, cos, and tan is used when...
Looking for a missing side length in a right triangle
Looking for a missing angle
measure in a right triangle.
Sin-1, cos-1, and tan-1 is used when...
Looking for a missing 
side length in a right triangle

Looking for a missing angle
measure in a right triangle.
What trig ratio would you use to solve for x?
opposite
?
sin
x = 
cos
adjacent
?
tan
round to the nearest tenth
hypotenuse
?
Not used =
What trig ratio would you use to solve for x?
x = 
sin
adjacent
?
hypotenuse
?
cos
round to the nearest tenth
tan
Not used =
opposite
?
What trig ratio would you use to solve for x?
x = 
sin
opposite
?
hypotenuse
?
cos
round to the nearest tenth
tan
Not used =
adjacent
?
What trig ratio would you use to solve for x?
hypotenuse
?
sin-1
x = 
cos-1
round to the nearest tenth
tan-1
opposite
?
Not used =
adjacent
?
What trig ratio would you use to solve for x?
x =
sin-1
adjacent
?
cos-1
round to the nearest tenth
tan-1
opposite
?
hypotenuse
?
Not used =
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