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4 cards from this section. Quick, good the night before a test.
Calculate sin(30°).
Use the sine function's definition in a right triangle.
If the hypotenuse is 10 and the opposite side is 5, what is sin(θ)?
Remember the definition of sine.
What is sin(θ)?
Think about how triangles are structured.
True or False: Cosine is the reciprocal of sine.
Recall the definitions.
In a right triangle, the hypotenuse is 20 and one leg is 15. Calculate the other leg using Pythagorean theorem and find sin(θ) and cos(θ).
Use the Pythagorean theorem for the leg and then sine/cosine formulas.
A person stands 10 meters away from the foot of a building and sees the top at an angle of elevation of 30 degrees. How tall is the building? Use trigonometric functions to answer.
Use the tangent function; opposite side is the height of the building.
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