Mathematics, 28.12.2019 02:31 larenhemmings

Which statement is always true? a) the sine of an angle is equal to the sine of the angle's complement. b) the cosine of an angle is equal to the sine of the angle's supplement. c) the sine of an angle is equal to the cosine of the angle's complement. d) the cosine of an angle is equal to the cosine of the angle's supplement.

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