[" In fig."1,PQ" is a tangent at a point...

[" In fig."1,PQ" is a tangent at a point "C" to a circle with centre "O." If "AB" is a "],[" diameter and "/_CAB=30^(@)" ,find "/_PCA" ."],[qquad [" C "],[qquad [" O "],[" Cigure "1]]],[" Figure "1]

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