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Pre-calc

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1. Find the polar coordinates of (8, –8) for r > 0.

2.Find the rectangular coordinates of (9, 150°)

  • Pre-calc - ,

    (r,θ) = (8√2,315°) or ((8√2,-45°)
    (x,y) = (9cos150°,9sin150°) = (-9/2, 9/2 √3)

  • Pre-calc - ,

    dang - gotta stop typing too fast:
    (x,y) = (9cos150°,9sin150°) = (-9/2 √3, 9/2)

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