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![[Post New]](/templates/default/images/icon_minipost_new.gif) 9 Sep 2008 14:48:42 IST
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if sinA + sin2A = 1
then prove that ;
cosA + cos2A = 1
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9 Sep 2008 19:04:13 IST
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u hav posted a wrong question. instead it shud be cos^2a+cos^4a=1
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this reply: 7 points
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9 Sep 2008 19:47:51 IST
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if sinA + sin2A = 1
then, sinA = 1 - sin2A = cos2A
this implies that
cos2A + cos4A = 1
not cosA + cos2A
the question is wrong
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this reply: 5 points
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10 Sep 2008 08:58:05 IST
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yes it shud be cos^2a+cos^4a...........
see class 10th R D Sharma.
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"The pain will always subside,,,,,it may last for a second,for a minute ,for an hour,or for a year,,,,,,,but if I quit,,,it lasts forever"
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this reply: 5 points
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