Step 1 :
\From the result of http://www.mathskey.com/question2answer/31982.
\\
\
Voltage in is
.
Find current across capacitor.
\Observe the circuit, .
Current across capacitor : .
Substite and
in current across capacitor
.
Step 2 :
\Voltage in is
.
Substitute and
in current across capacitor
.
Therefore the current across capacitor is .
Solution :
\.