Maths-
General
Easy
Question
The sides of a triangle are 
and 
for some 
Then the greatest angle of the triangle is
Hint:
In this question first we have to check which side is greatest and then we have to use Cosine rule. 
The correct answer is:
In this question we are given the sides of triangle as 
Let the sides be 
It can be easily seen that the side 
is the greatest. We know that the angle opposite to greatest side is the greatest.
By using Cosine Rule
=>
By using the trigonometric identity
=>
=> 
=> 
=>
Hence, the greatest angle is 
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