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A closed cone is placed with water half of its height as shown below in fig 1 . If it will completely revolved then water goes down and height will change . So at what height from the base water will stay? Find X.


 


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4 years ago

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Find the conditions on a and b such that line ax +by-1=0 intercepted bw lines ax+y+1=0 and x+by=0 subtend right angle at origin.
 
 
Find the intersection of ax+by=1 with 2 lines, you will get two points, (1/(a-1) , -1/[b.(a-1)]) and (-(b+1)/[a.(b-1)] , 2/(b-1)), To prove two point say A(x1,y1) and B(x2,y2) subtend angle ...
 
Akshay 9 months ago
co-ordinates of four points A,B,C and D are (0,-1), (-1,2), (15,2) and (4,-5) respectively. Find the ratio in which line segment AC divides the line segment BD internally
 
 
try to use section farmula and slope of i think this will help u to get u from it If it is help to get ans then approve it
 
vedant patil 9 months ago
 
try to use section farmula and slope of i think this will help u to get u from it If it is help to get ans then approve it
 
vedant patil 9 months ago
equation of common tangent to two circles.please tell the proof of deriving the equation...................................................................................
 
 
Dear Student, You can get the hint of the derivation on the following link: http://www.askiitians.com/iit-jee-coordinate-geometry/common-tangents.aspx Thanks.
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Vijay Mukati 4 months ago
Why do we use x=1 (and not any other value for x) for finding the sum of binomial coefficients?
 
 
because we need the coefficients only and anything apart from 1 will not be neglected as it will increase the the value of coefficients
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Sourabh Singh 14 days ago
 
because we dnt want any variables to be present when u addbinomial coefficients
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Nishant Vora 14 days ago
what is the period of |sin3x|+|cos3x|
 
 
@anvesh: Not necessary, Assume a function f(x) = |sin x| + |cos x| it will be repeated after pi/2, as | cos(pi/2+x) | = | sin x | and same for | sin(pi/2+x) | = | cos x |. So, f(x+pi/2) =...
 
Akshay 9 months ago
 
period of mod sinx is ^ and same for cosx so period is period of sin3x and cos3x lcm so answer is lcm of ^/3 and ^/3 that is ^/3
 
anvesh 9 months ago
cot3a=?
 
 
Hint: Replace cotA by 1/tanA and then use the formula for tan3A. Thanks.
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Vijay Mukati 10 months ago
 
Hint: Replace cotA by 1/tanA and then use the formula for tan3A. Thanks.
 
pa1 7 months ago
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