Question

In a triangular ABC,`ltABC =75^(@)and ltACB =(pi)/(4)` The cicular measure of `ltBAC` is (एक त्रिभुज ABC में `ltABC=75^(@) ` तथा `ltACB =(pi)/(4)` तो `ltBAC` का वृत्तीय माप ज्ञात करे )
A. `(5pi)/(12)"radian"`
B. `(pi)/(3)"radian"`
C. `(pi)/(6)"radian"`
D. `(pi)/(2)"radian"`

Answer 1

Correct Answer - b

`(pi^(@))/(4)=(180^ (@))/(4)=45 ^(@)`
`angleBAC=180^(@) -75^(@)-45^(@)= 60^(@)`
` 1^(@)rarr(pi)/(180^(@))`
` 60^(@)rarr(pi)/(180^(@))xx 60^(@)=(pi)/(3)` radian.