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Special angles and exact trigonometric values
Worksheet
Grade Level
Trigonometry
TRIG.39 Special angles and exact trigonometric values
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🔴 Hard
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A negative angle of -13pi/6 is coterminal with 11pi/6. What is cos(-13pi/6)?
A
-sqrt(3)/3
B
sqrt(3)/2
C
-sqrt(3)/2
D
-1/2
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