Answer:
 The phase angle in an RLC circuit is determined by the value of the components, the frequency of the source, and the type of connection (series o parallel). The phase shift is the difference in peak in the waves from different circuit points, or in relation to the power source. 
 
Step-by-step explanation:
The phase angle can be determined in a series circuit by the equation: 
![\omega = 2*\pi*f  </p><p>\\ </p><p>\phi = tan^(-1){\left[ (2*\pi*f*L-((1)/(2*\pi*f*C)))/(R) \right ]}/tex] </p><p> </p><p>And in a parallel circuit: </p><p>[tex]\omega = 2*pi*f  </p><p>\\ </p><p>\phi = tan^(-1){\left [R(1)/(2*\pi*f*L)-2*\pi*f*C  \right ]}](https://img.qammunity.org/2020/formulas/physics/high-school/y9kemwbkz4ll261un5e3eazbig4604pqc9.png) 
 
And finally to calculate the phase shift, you can substrac the phase angle, from the source angle, that usually is 90°.