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Unit Circle Definitions of Sine and Cosine
Worksheet
Grade Level
Pre-Calculus
Pre-CAL.76 Unit Circle Definitions of Sine and Cosine
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The angle theta = -13pi/4 is coterminal with a second-quadrant angle. Which choice is correct?
A
point = (0, 1); sin(theta) = 1; cos(theta) = 0
B
point = (sqrt(2)/2, -sqrt(2)/2); sin(theta) = -sqrt(2)/2; cos(theta) = sqrt(2)/2
C
point = (sqrt(2)/2, sqrt(2)/2); sin(theta) = sqrt(2)/2; cos(theta) = sqrt(2)/2
D
point = (-sqrt(2)/2, sqrt(2)/2); sin(theta) = sqrt(2)/2; cos(theta) = -sqrt(2)/2
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