Question

Find the value of x.
a) 80
b) 90
c) 45
d) 60​

Answer 1

b

Explanation:

The tangent- tangent angle x is half the difference of its intercepted arcs.

Th sum of the arcs in a circle = 360°

major arc = 360° - 90° = 270° , then

x =
`(1)/(2)` (270 - 90)° =
`(1)/(2)` × 180° = 90° → b