<li>[SF6 1.P.035.]
A point is located in a polar coordinate system by the coordinates r = 2.0 m and theta= 35°. Find the x and y coordinates of this point, assuming the two coordinate systems have the same origin.</li>
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<p>For my X coordinate I got 2, which it is telling me is wrong
For my y cooridinate I got 1.12, which it is telling me is correct</p>
<p>I did:</p>
<p>x= r cos of theta = 2cos(35)= -1.80738
y= r sin of theta = 2 sin(35)= -.856368</p>
<p>r = square root of (X^2 + y^2)
r= square root of apprx. 4
so r = 2, so why is my x coordinate wrong? r IS the x coordinate. what did I do wrong.</p>
<p>doing summer hw already? what a nerd.</p>
<p>x = 2cos(35) = 1.6838
y = 2sin(35) = 1.147</p>
<p>I have no idea what you are doing. What you said you did doesn't match up at all with what you said you got. And I think your calculator may be in radians rather than degrees because your calculations were wrong too.</p>
<p>draw a circle and graph...and a right triangle with the opposite side of 35 degress perpendicular to the x-axis. Hypotenuse equals 2. sin 35= y/2. y=1.15 cos 35= x/2. x= 1.64 Therefore your coordinate is (1.64, 1.15)</p>
<p>BTW how is Ap Physics? what math does it mainly consist of if you don't mind me asking.</p>
<p>you don't need calc for mechanics, but it makes things a lot faster and easier.</p>
<p>calculus is definitely needed for e+m. don't let those score distributions fool you, e+m is waaaaaaaaay harder than mechanics.</p>