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3 cards from this section. Quick, good the night before a test.
What is the sine of a 90° angle?
Think about the opposite side compared to the hypotenuse.
What is cos(0°)?
Recall the definition of cosine.
What is the value of sin(30°)?
Think of the special triangles.
True or False: Cos(90°) = 0.
Remember the definition of cosine.
A ladder is leaning against a wall forming a 60° angle with the ground. If the foot of the ladder is 4 feet away from the wall, find the height the ladder reaches on the wall.
Use the tangent ratio.
If sin(θ) = 0.75, find the hypotenuse of a triangle where the opposite side is 6.
Rearrange the sine formula for hypotenuse.
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