• JEE Main
• 
• Mathematics
• Back to Doubt Clearing

Q.

Trigonometry doubt

Let A and B denote the satements

                            A : \( \cos \alpha+\cos \beta+\cos \gamma=0\)

                            B : \( \sin \alpha+\sin \beta+\sin \gamma=0\)

If \(\cos (\beta-\gamma)+\cos (\gamma-\alpha)+\cos (\alpha-\beta)=-\frac{3}{2},\)then 

(a) Both A and B are true

(b)  Both A and B are false

(c) A is true and B is false

(d) A is false and B is true