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CBSE Class 12 Science Mathematics Free Doubts and Solutions

CBSE - XII Science - Mathematics

There are N fish in a pond. A fisherman catches M of them, tags them and releases them back into the pond. If the fisherman catches 'r' tagged fish after K trials, what is the value of N?

Asked by bjayanta 18th August 2019, 8:14 PM
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CBSE - XII Science - Mathematics

If the best and the worst paper never appear together, then six examination papers can be arranged in how many ways. This is question of permutations and combination 

Asked by aks5685319 6th July 2019, 10:15 AM
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CBSE - XII Science - Mathematics

 


3 vector are vector a, vector b and vector c like as vector a + vector b + vector c=0; if mod vector a =1, mod vector b=4 and mod vector c=2 , then find out the expreation of mio( mu)=vector a dot vector b + vector b dot vector c + vector c dot vector a

Asked by broy31122002 19th June 2019, 10:21 PM
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CBSE - XII Science - Mathematics - Inverse Trigonometric Functions

If y^x = e^(y-x) then prove dy/dx = (1+logy)^2/logy

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Asked by ranaakshat345 17th June 2019, 1:28 PM
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CBSE - XII Science - Mathematics

show without expanding ,open vertical bar table row cell 1 squared end cell cell 2 squared end cell cell 3 squared end cell cell 4 squared end cell row cell 2 squared end cell cell 3 squared end cell cell 4 squared end cell cell 5 squared end cell row cell 3 squared end cell cell 4 squared end cell cell 5 squared end cell cell 6 squared end cell row cell 4 squared end cell cell 5 squared end cell cell 6 squared end cell cell 7 squared end cell end table close vertical bar
=0

Asked by Shivendra 1st June 2019, 10:04 PM
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CBSE - XII Science - Mathematics

examine the continuity of f(x) at x=0 if f(x) = sin2x/2x , x!=0 f(x) =2 , x=0

Asked by sarkangsawma 31st May 2019, 1:45 PM
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CBSE - XII Science - Mathematics

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CBSE - XII Science - Mathematics

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CBSE - XII Science - Mathematics

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