Question

5. In triangle ABC, if a = √3, b= √2 and c = √6 + √ 2 /2.then find the angle of
triangle and show that 2A = B + C.
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Answer 1

Answer:

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Asked on December 20, 2019 byRoshini Shelkar

The sides of a triangle are in ratio 1:3:2 then the angles of the triangle are in the ratio ?

A

1:3:5

B

2:3:4

C

3:2:1

D

1:2:3

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ANSWER

Solution:

Let  

             a=x,b=3x,c=2x

we have 

Cosine rule ⇒cosC=2aba2+b2−c2

                          cos C=2x(3x)x2+(3x)2−(2x)2

                          C=cos−1(0)=2π=90∘      

          

similarly cos B=

Answer 2

Answer:

The product of four negative integers is a positive integer