(adsbygoogle = window.adsbygoogle || []).push({}); Bit of a problem with polar coordinates. (Only trig knowledge needed.)

Right. So, in this problem, I'm given the polar coordinate point (rad2, 4.39) -- "rad2" being, naturally, short for radical 2. I'm to find the rectangular coordinates of the point, using the formulas:

x=rcos Theta

andy=rsin Theta. In this problem,r= rad2 and Theta = 4.39.

Simple, no? Only for some reason, it's not coming out right with my calculator. I substitute the givens, for:

x= rad2 * (cos 4.39)

andy= rad2 * (sin 4.39).

I have the answers -- they're in the back of the textbook -- but can't figure out the process.xshould equal approx. -0.45, andyshould equal -1.34. Instead, I findxto equal 1.41 andyto equal 0.11. Am I doing something in the wrong order?

Any help is appreciated. Thanks. ; )

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# Homework Help: Bit of a problem with polar coordinates.

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