In fig 2 PA and PB are two tangents drawn from an external point P to a circle with centre c and radius 4 cm. If PA perpendicular to PB, then find the length of each tangent.
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angle CAP = angle CBP = angle APB = 90°
Then, angle ACB = 90°
Adjacent sides(radii) are equal, hence CAPB is a square.
Therefore, AP = BP = 4cm
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