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2 cards from this section. Quick, good the night before a test.
What is the sine of 30°?
Think about the ratio opposite/hypotenuse.
If the adjacent side is 5 cm and the angle is 60°, how do you find the hypotenuse?
Use the cosine function.
What is the tangent of a right triangle defined as?
Think about the 'ratio' related to the angle.
True or False: The cosine of 90° is equal to 1.
What happens at right angles?
A triangular playground has a hypotenuse of 25 meters and an angle of 30°. Calculate the length of both the opposite and adjacent sides.
Use the sine and cosine formulas to find both sides.
In a right-angled triangle where the opposite side measures 8 cm and the hypotenuse is 10 cm, determine the angle θ.
To find the angle, use the inverse function of sine.
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