In a triangle ABC, ∠ABC = 75° and ∠ACB =πc.

Home » Aptitude » Trigonometry » Question

In a triangle ABC, ∠ABC = 75° and ∠ACB = π^c . The circular measure of ∠BAC is
4

Using Rule 1,
∠ABC = 75°
[∵ 180° = π radian or π^c ]

75° =		π	× 75 =	5 π	radian
		180		12

∴ ∠BAC = π -		π	-	5 π
		4		12

=		12π - 3π - 5π	-	4 π
		12		12

=	π	radian
	3

In a triangle ABC, ∠ABC = 75° and ∠ACB =	π^c	. The circular measure of ∠BAC is
	4