Trigonometric Equations Question 256
Question: Sides of a triangle are $ 2cm,\sqrt{6},cm $ and $ (\sqrt{3}+1)cm $ . The smallest angle of the triangle is
Options:
A) $ 30^{o} $
B) $ 45^{o} $
C) $ 60^{o} $
D) $ 75^{o} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ a=2,b=\sqrt{6},c=\sqrt{3}+1 $ \ $ \cos A=\frac{6+3+1-2\sqrt{3}-4}{2\sqrt{6}(\sqrt{3}+1)}\Rightarrow A=45^{o} $ .
BETA
