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				   Q)Direction cosines of 2 lines are connected by the relation:-al+bm+cn=0 & fmn+gnl+hlm=0.Find the condition that these 2 lines will be (a)perpendicular (b)parellel
				   

4 years ago

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a variable tangent to the ellipse 4x^2+6y^2=12 intersects the co ordinate axes at A,B the curve described by the mid point of ab is
 
 
The equation of the given ellipse is Let be any point on the ellipse. The equation of the tangent at this point is Let the mid point of AB is P(h,k). The equation of the required curve is
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BALAJI ANDALAMALA 3 months ago
do max and min questions come in IITJEE a 2 +4b 2 =4 find the max value of 3a+2b-2
 
 
hello rahul, in the first given equation a2+4b2=4 put a=0 we get b=1 put b=0 we get a=2 then substitute in the 3a+2b-2 we get 6
 
raj kumar one month ago
 
 
jagdish singh singh 21 days ago
In a graph is it possible that three lines intersect each other at a same point.
 
 
Dear student, From a point, infinate number of lines can be drawn passing through it. Thanks.
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Vijay Mukati 8 months ago
 
yes ,it is possible because in graph, through a point infinite lines can be passed
 
Akhil Chinnu 8 months ago
Is there any direct formula relating the sides of a triangle and it's area in vectors
 
 
the area of a triangle in vector form is A=|ab*ac|1/2 for any queries send me mail to my username ths is given in some book that is the area of a triangle in vector form if it is wrong iam...
 
Rock Guitarian 4 months ago
tan(c-d)
 
 
What exactly did you want as an answer? wanted me to derive the main equation. I think i misinterpreted your question.
 
Neeti 9 months ago
 
yep i want not (a-b) i want (c-d)
 
vivek 9 months ago
 
tan(a-b) = (tan A – tan B )/ 1+ tanA tanB
 
Neeti 9 months ago
PROVE USING VECTORS INTERNAL BISECTORS OF ANGLES OF A TRIANGLE ARE CONCURRENT
 
 
Use property of contradiction after assuming that they are not concurrent. Prove that the result is coming false by using the properties of triangle . In this fashion you can get the answer.
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Sourabh Singh one month ago
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