Trig-Please check

posted by Angela P.

What are polar coordinates of (4,6)
1.Round r to nearest hundredth and theta to nearest hundredth of RADIAN
My work:
r^2 = x^ + y^2
r^2 = 4^2 + 6^2
r^2= 16 +36
r^ =52
I'm stuck on how to do theta in Radians, could you please assist

  1. Damon

    tan theta = 6/4 = 1.5
    if your calculator does radians just do tan^-1 of 1.5
    if it does degrees only then
    tan^-1 1.5 = 56.3 degrees
    56.3 * pi/190 = .98 radians

  2. Angela P.

    Thank you Damon-I reworked it on the calculator to make sure I knew what I was doing-thank you again for helping

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