In the figure above, A and B are end points of diameter of a circle with centre at P and C is a point on the circumference of the circle such that ∠ABC=35∘, the what is the ∠PCA?
A
25∘
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B
30∘
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C
35∘
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D
55∘
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Solution
The correct option is D55∘
Given, ∠ABC=350
A,B and C are the vertices of the right angled triangle where ∠ACB=90∘ ∴∠BAC=90∘−35∘=55∘=∠PAC Now ∠PAC=55∘ and ∠PAC=∠PCA ∴∠PCA=55∘