If the angle between two radii of a circle is 100 degree, the angle between the tangents at the ends of those radii is
Refer the solution of part (3) in the given link :
https://www.meritnation.com/ask-answer/question/if-angle-between-two-radii-of-a-circle-is-130-find-the/circles/1832837
https://www.meritnation.com/ask-answer/question/if-angle-between-two-radii-of-a-circle-is-130-find-the/circles/1832837