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Pre Cal

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Find the exact value of the cosine and the cosecant of thetha, if thetha terminates in quadrant II and sin theta = 4/5

  • Pre Cal - ,

    cos^2 + sin^2 =1
    cos^2 = 1-16/25 =9/25
    sin theta terminates in quadrant II, so sin>0 but cos <0
    therefore cos =-3/5

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