converting polar degrees to coordinates.

[jerryreeve]

I am trying to convert a list of polar coordinates (in degrees not pi) and distance from center to XY coordinates. Problem is that x=r COS(angle) and y = r sine(angle) while returntin to me values the positive and negative values are a bit hosed

	R	     Angle	     X	        Y	         expected quad`	       resultant quad
	Distance  Angle	     R Cos(Angle) R Sine(Angle) (1-90 I) (90-180 2) etc  (+,+ q1)(-,+ q2)(-,- q3) etc
1    4.39      220.514624	   3.615426602   2.490138648	III	               I
2    4.39      220.5086908	  3.63013724    2.468644085	III	               I 
3    8.6       101.5693036	  4.365809477   7.40943369	 II	                I
4	10.5       53.38094708   -10.49641616    0.274313163	I	                 II
5	11.4	  317.6069916    -10.86996747   -3.435666933	Iv	                III
6	11.4	  317.6030641    -10.88337744   -3.392947914	Iv	                III
7	11.4	  115.1453482     -5.236114523  10.12635693	 II	                II
8	11.8	  331.7618106      3.754261488 -11.18684588	 Iv	                Iv
9	11.9	   26.08947075     6.856733126   9.726006932	I	                 I
10   15.9	  153.2679944    -12.46231427    9.874245447	II	                II
11   16.5	   63.99576602     6.529859842  15.15291822	 I	                 I
12   16.6	  272.1195961     -6.031152544  15.46561344	 Iv	                II
13   16.6	  272.1225627     -6.077005821  15.44765355	 Iv	                II
14   16.8	  298.5250696    -16.75431086   -1.238171125	Iv	                III
15   18.8	  293.9063649      3.133402155 -18.53703835	 Iv	                Iv
16   19.3	  224.9916435      6.939011071 -18.00944545	 III	               Iv

Only lines 8 9 10 11 and 15 give me the expected result that is the coordinates for x and y being (+,+) for quadrant 1 (+,-) for quadrant 2 (-,-) for quad 3 and (-,+) for quad 4 by that I mean in line 1 with an anble of 220 degrees I know the result will be in the third quad but the formula result is showing first quad. What am I missing? do I need to do a complex if statement to define the quads first then figure the resulting angles into coordinates?



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Hill?? What hill??
I didn't see any $%@#(*$ Hill!!
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JerryReeve
Communication Systems Int'l
com-sys.com

 

[combo]

All your results are wrong and it's not the problem of sign only: SIN and COS functions require arguments in radians, you pass degrees ([radians] = [degrees] * PI() /180)

combo

 

[jerryreeve]

Thanks, it has been years since algebra and I couldn't bring it back up in the mind even though I knew what I was looking for with the results. R COS (Degrees * PI()/180) is giving me a good output. I thought that the number results were off but I was trying to get the quadrants straight first, Probably should have been working on finding the correct formula first. appreciate it.

----------------------------
Hill?? What hill??
I didn't see any $%@#(*$ Hill!!
----------------------------
JerryReeve
Communication Systems Int'l
com-sys.com