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1. The problem statement, all variables and given/known data

In an L-C series circuit with very small resistance, the voltage drops across inductor and capacitor are 100V and 120V,. What's the phase angle?

2. Relevant equations

tantheta= Xl -Xc)/ R

3. The attempt at a solution

According to book's explanation, tantheta= (Xl -Xc)/ R is infinity..!??

Why?? and the answer is -90degree...

Please explain!!:)

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# Homework Help: Phase angle? L-C series

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