Flat 50% off
BUY NOWEnds in

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
Updated Fri, 31 May 2019 05:28 pm

In Fig., DE || AC and DF || AE. Prove that
\(\frac {BF}{FE} = \frac {BE}{EC}\)
Updated Fri, 31 May 2019 05:26 pm