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*Mentor note: moved to homework section*

y = sin(x)

y = cos(x)

y = tan(x)

y = csc(x)

y = sec(x)

y = cot(x)

(a) 0 (b) 4 (c) 6 (d) 2

I thought it was (c) because i graphed all the trig functions and they passed the vertical line test but the answer sheet is saying (d) 2

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