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The tangents from an external point are equal in length. Let the angle subtended by the tangents at the center be 2θ, then OP is the hypotenuse of the right triangle OAP, where OA is the radius, and PA is the tangent. Using the relationship cos(θ) = r / 2r = 1/2, we get θ = 60°. Hence, the angle subtended by the tangents at P is 2 * 60° = 120°.
Which of the following is an example of mutualism?
Which of the following is the correct set-up for electrolytic refining of silver?
The force which opposes the relative motion between different layers of liquid or gases is called –
Which of the following element is found in maximum percentage in the human body?
Which one among the following fuels is used in gas welding?
Which one of the following diseases in humans can spread through air?
Which of the following does not show heterotrophic nutrition?
Match the following:
Lux is the SI unit of -
A potentiometer wire of length 1 m has a resistance of 5 Ω. It is connected to a 6 V battery in series with a resistance of 10 Ω. Determine the emf ...