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![[Post New]](/templates/default/images/icon_minipost_new.gif) 2 Apr 2007 11:33:16 IST
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then cos  1=? |
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2 Apr 2007 11:35:43 IST
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-1<=sin <=1.This is the range of sine!!! Since,it is given Sintheta1+sintheta2+sintheta3=1 Sin can have a maximum of 1 at (2n+1)pi/2!!! Hence theta1=thata2=theta3=90!! costheta1=0!! Hence the answer is 0!!!
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2 Apr 2007 11:51:30 IST
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sin 1+sin 2+sin 3=3 is pissible only when 1= 2= 3=  /2 so costheta1=0
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2 Apr 2007 12:22:35 IST
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hiiiii....... sintheta has da maximum value 1. sintheta1+sintheta2+sintheta3=3 is only possible when all the three angles are 90. so value of costheta1=cos90=0 hence da answer is 0. hope u got it thanku!!!!!!
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2 Apr 2007 12:27:37 IST
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Yes troy and arjun have rightly argued that sin 1+sin 2+sin 3=3 is possible only when 1= 2= 3= /2 thus cos 1 = cos /2 = 0 |
The Scientist does not study nature because it is useful; he studies it because he delights in it, & he delights in it because it is beautiful. If nature were not beautiful, it would not be worth knowing, life would not be worth living. Ofcourse I do not here speak of that beauty that strikes the senses, the beauty of qualities & appearances; not that I undervalue such beauty, far from it, but it has nothing to do with science; I mean that profounder beauty which comes from the harmoniuos order of the parts, & which a pure intelligence can grasp. |
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2 Apr 2007 14:48:36 IST
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sin theta 1+sin theta 2+sin theta 3=3 if and only if theta=90
thus, cos theta 1=cos 90=0
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vision for iit never ends........ |
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