Answer:
x = 30°
Step-by-step explanation:
The tangent and secant from a point outside the circle combined with the radius form a triangle.
The sum of the 3 angles in the triangle = 180°
The angle at the centre of the circle = 60° ( equilateral triangle )
The angle between the tangent and the radius on the circle = 90°, thus
x = 180° - (90 + 60)° = 180° - 150° = 30°
