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4 cards from this section. Quick, good the night before a test.
What is the hypotenuse of a right triangle whose opposite side is 3 cm, and angle θ is 30°?
Use the sine function definition.
If one angle is 90° and the opposite side is 4 cm, what is the adjacent side if the angle is 30°?
Use the tangent function.
What is the sine of a 30° angle?
Think about the ratios in a right triangle.
Is the tangent of 90° defined?
Consider the definition of tangent.
A tall building casts a shadow of 20m when the angle of elevation from the tip of the shadow to the top of the building is 30°. How tall is the building?
Use the tangent ratio to find height.
In a right triangle, the angle θ = 45°, if the hypotenuse is 10 cm, what are the lengths of the opposite and adjacent sides?
Use sine and cosine for a 45° angle.
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