Integrating factor of dy/dx + (1/x)tany= (1/x²)tanysiny is________

please work it out for me

If the value of (x²+x-1)/(x²+x+1) is in the form 2cos² where 0<=<= then

lies in the interval

 

a)[pi/4, 3pi/4]

b)[pi/3, 2pi/3]

c)[pi/6, 5pi/6]

d)[0,pi/2]

 

 

kindly explain soon

(CMe3)CBr + H2O gives (CMe3)COH +HBr

This reaction is an example of nucleophilic substitution but not free radical substitution but why

 

 

 

also

 

Is  K2CO3 not a source of CO2 in submarines

soon pleas

IS decrease in entropy as gas condenses into liq more or liquid solidifies into soild more

pleasde explain

KF has NaCl structure. What is the distance between K+ anf F- in KF is the density is 2.48g/cc?

fast

A longitudinal standing wave y=acoskxcoswt is maintained in a homogeneous medium of density d Find theexpression for space density of

a)potential energy Ep (x,t)

b)kinetic energy Ek (x,t) 

Demonstrate that any differentiable function f(t+ax), where a is a constant provides a solution of wave equation. what is the physical meaning of thwe constant a

 

A plane elastic wave y=acos(wt-kx) propagates in a medium K find the equation of this wave in a reference frame K' moving in the positive direction of the x axis with a constant velocity V relative to the medium K

please explain