If an angle and a side of a right angle triangle is known , then rest of the sides and angles can be found as follows
In `DeltaABC `(figure ), if `angleB=90^(@),angleC=theta and BC=x`, then `AB=x tan theta and AC=x sec theta ` .

Now, consider in isosceles triangle PQR (Figure 2),

Where PQ=PR and `20N=sqrt(3)`
On the basis of the above information answer the question
The angle of triangle PQR are

Options

A. `pi`
B. `(pi)/4`
C. `(3pi)/4`
D. `3pi`

Answer

B