Read the following text and answer the following questions on the basis of the same :

Two men on either sider of a temple of 30 metres high observe its top at the angles of elevation `alpha` and `beta` respectively, (as shown in the figure above).
The distance between the tow men is `40sqrt3` metres and the distance between the first person A and the temple is `30sqrt3` meters.
Domain and Range of `cos^(-1)x=`

Options

A. `(-1,1),(0,pi)`
B. `[-1,1],(0,pi)`
C. `[-1,1],[0,pi]`
D. `(-1,1),[-(pi)/(2),(pi)/(2)]`

Answer

C