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trig

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Which basic trigonometric function has the same graph as y= -cot(x+(pi/2)).Please justify your answer.

  • trig -

    y = -cot(x+(pi/2))
    = -cos(x + pi/2)/sin (x + pi/2)
    = (-cosx*cospi/2)-sinx*sin pi/2)/
    [(sinx cos pi/2)-cosx*sin pi2)]
    = -sinx/-cosx = tanx

  • trig -

    8========)--------

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