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4 cards from this section. Quick, good the night before a test.
Define sine, cosine, and tangent in terms of a right triangle.
Think about the sides of the triangle related to the angles.
What is the amplitude of a cosine function?
Look at how high the curve goes from its central axis.
What is the period of the sine function?
Think of how many degrees it takes to complete a full cycle.
True or False: The sine of an angle is equal to the cosine of its complement.
Consider the relationships in a right triangle.
Prove that sin(θ) = cos(90° - θ) using the unit circle definition.
Consider how angles relate within the unit circle.
If y = 5sin(4x - 30°), determine the amplitude, period, and phase shift.
The structure A sin(Bx - C) helps extract these values directly.
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