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The expression $\sin(90^\circ - \theta)$ is equal to:
Acos θ
Bcosec θ
Ctan θ
Dsin θ
Answer & Solution
Correct answer: A. cos θ
Complementary-angle identity: sin(90°−θ) = cos θ.
Related questions
Ratios are also defined for angles of measure 0 and:If the sides about the right angle are 3k and 4k, the hypotenuse is:tan A can be written as sin A divided by:The identity cosec2 A equals 1 plus:The identity sec2 A minus tan2 A equals:Which identity is proved first in this chain?An equation true for all values of the angle is called an:The value of cosec 30 degrees is: