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The tangent at a point \(C\) of a circle and a diameter \(AB\) when extended intersect at \(P\). If \(\angle PCA = 110^\circ\), find \(\angle CBA\). [Hint: Join \(C\) with centre \(O\)]
 
YCIND_240308_6083_circles_52.png
 
\(\angle CBA = \) \(^\circ\)