y=(tanx)power(tanx)power(tanx).........infinity.

prove that  dy/dx =2  if   x=pie/4.

 why the period of    mod(sinx) + mod(cosx) is  pie/2 ???

A sinusoidal voltage of peak value 283 volt and frequency 50 Hz is applied to series in LCR circuit in which R=3 ohm , L=25.48 mH , C=0.000796 F. Find=

a) rms voltage

b) X_L and X_C

C) impedence(Z)

d) peak current and phase angle

e) rms value of current and voltage across circuit elements

f) power dissipated in circuit

g) power factor

h) power input

i) frequency of supply at which resonance occur.

j) impedence at resonant condition

k) the current at resonant condition.

l) power dissipated at resonant condition.

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