Homework Statement
If tan(A+B) = 3 and tan(A-B) = 2, find tan2A and tan2B
Homework Equations
tan (A - B) = (tan A - tan B)/(1 + (tan A)(tan B) and similar sort of one for tan(A+B)
The Attempt at a Solution
i did some calculation and got tanA= (1-2tanB)/5tanB
after which there...
Homework Statement
A bomb is dropped from a plane flying horizontally with uniform speed. Show that the bomb will explode vertically below the plane.
Is the statement true if the plane flies with uniform speed but not horizontally?
Homework Equations
Equations of projectile perhaps...
Homework Statement
On boiling 1litre of N/5 HCl, the volume of the aqueous solution decreases to 250ml. If 3.65g of HCl is removed from solution, then the concentration of resulting solution becomes?
N/5
N/2.5
N/20
N/10
Homework Equations
HCl=36.5g/ mol
The Attempt at a Solution...
Homework Statement
A crew of an 8 oar boat has to be selected from 11 people, out of which 5 can oar only on one side, 4 can oar only on the other side and 2 can oar on either sides, find in how many ways can the selection be done?
The Attempt at a Solution
What I did here is assumed...
Homework Statement
how many 4 digit numbers are there which do not contain more than 2 different numbers?
Homework Equations
The Attempt at a Solution
all can contain the same digit
any 3 out of the 4 places can be occupied by the same digit
and
any 2 out of the 4 places can...
Homework Statement
There are 15 players, out of which 4 players own one 4 seater car each, and the car will be driven by the owner himself. In how many ways can they be seated in the cars?
Homework Equations
(3n)!/(n!)3
The Attempt at a Solution
i know that i have to substitute...
Homework Statement
find total sigma and pi bonds in c6h6
Homework Equations
Benzene structure
The Attempt at a Solution
if i consider benzene structure, then total will be 12σ and 3∏ but according to the random structure that i managed to draw, it showed, 11σ and 4∏, was i wrong...
Homework Statement
CH3CN [ in presence of aq. H2SO4 and 2H2O] → CH3COOH + NH3
The Attempt at a Solution
There is a triple bond present between Carbon and nitrogen, hence the first will be sp hybridized, while there is double bond between carbon and oxygen in the second, hence it should...
Homework Statement
In the hybradization of ethyne molecule, how many σ and ∏ bonds are being formed?
The Attempt at a Solution
Since, there is a triple bond between the carbon atoms, it should form 2 ∏ bonds and 1 σ bond.
Relatively there will be 2 other σ bonds between Carbon-Hydrogen...