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Mathematics, 19.05.2021 09:10 longboard5967

Give the exact value of the trigonometric function. sec( $\frac{\pi }{2}$ )
A. 1
B. -1
C. 0
D. undefined

Please explain your answer, thank you! I'll give brainliest.

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Give the exact value of the trigonometric function. sec()
A. 1
B. -1
C. 0
D...

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