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March 26, 2017

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using the given point (9, squareroot 19) find the value of cosx

  • trig - ,

    Given point P(9,√19).
    r=sqrt(9²+(√19)²)
    =sqrt(81+19)
    =sqrt(100)
    =10
    Cos(θ)=9/10=0.9

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