4:3 vs. 16:9

atan 3/4 = 36.87 deg, cos 36.87 = .8 (width), sin 36.87 = .6 (height)
atan 9/16 = 29.36 deg, cos 29.36 = .872, (width), sin 29.36 = .490 (height)
atan 1/1.85 = 28.39 deg, sin 28.39 = .475 (height)
atan 1/2.35 = 23.05 deg, sin 23.05 = .392 (height)

**Screen Size vs Aspect Ratio Comparison**
TV size	ratio	width	height	diagonal
19" 4:3	4:3	15.2	11.4	19
21" 4:3	4:3	16.8	12.6	21
24" 16:9	16:9	20.9	11.8	24

26" 4:3	4:3	20.8	15.6	26
	16:9	20.8	11.7	23.9
	1.85	20.8	11.2	23.6
	2.35	20.8	8.9	22.6

27" 4:3	4:3	21.6	16.2	27
	16:9	21.6	12.2	24.8
	1.85	21.6	11.7	24.6
	2.35	21.6	9.2	23.5

30" 16:9	4:3	19.6	14.7	24.4
	16:9	26.1	14.7	30
	1.85	26.1	14.1	29.7
	2.35	26.1	11.1	28.4

32" 4:3	4:3	25.6	19.2	32
	16:9	25.6	14.4	29.4
	1.85	25.6	13.8	29.1
	2.35	25.6	10.9	27.8

34" 16:9	4:3	22.3	16.7	27.8
	16:9	29.6	16.7	34
	1.85	29.6	16	33.6
	2.35	29.6	12.5	32.1

36" 4:3	4:3	28.8	21.6	36
	16:9	28.8	16.2	33
	1.85	28.8	15.6	32.7
	2.35	28.8	12.3	31.3

38" 16:9	4:3	24.8	18.6	31
	16:9	33.1	18.6	38
	1.85	33.1	17.7	37.6
	2.35	33.1	14.1	36

40" 4:3	4:3	32.0	24.0	40
	16:9	32.0	18.0	36.7
	1.85	32.0	17.3	36.4
	2.35	32.0	13.6	34.8

Broadcasting

E Frank Ball frankb@sonic.net