Question

If A (2theta -1,7) B (-3,1) AB = 20 units find theta?
pls answer this with full explanation!!​

Answer 1

Answer:

Centre: C(2a−1,7)

Point: P(−3,−1)

Radius=

2

1

(20)=10

As circle passes through P, distance between p and centre is equal to radius.

=>(PC)

2

=(10)

2

=>(2a−1+3)

2

+(7+1)

2

=(10)

2

=>(a+1)

2

=

4

36

=>(a+1)

2

=9

=>a=2,−4