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Use Sine-Cosine Relationships for Complementary Angles
Grade Level
Praxis Core
5165.190 Use Sine-Cosine Relationships for Complementary Angles
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Which identity is true for complementary angles 30° and 60°?
A
sin(30°) = cos(60°)
B
sin(30°) = sin(60°)
C
cos(30°) = -sin(60°)
D
tan(30°) = cos(60°)
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