Trigonometric Equations Question 228
Question: If the lengths of the sides of a triangle be $ 7,4\sqrt{3} $ and $ \sqrt{13} $ cm, then the smallest angle is
[MNR 1985]
Options:
A) $ 15^{o} $
B) $ 30^{o} $
C) $ 60{}^\circ $
D) $ 45^{o} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ \cos \theta =\frac{49+16.3-13}{2\times7\times4\sqrt{3}}\Rightarrow \theta =30^{o} $
BETA
