COMEDK Exam 2017 Solved Paper

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Question : 125 of 180

Marks: +1, -0

The sides a,b,c of a triangle are in AP. If cos‌α=‌

a

b+c

,cos‌β=‌

b

c+a

,cos‌γ=‌

c

a+b

then tan2‌

α

2

+tan2‌

γ

2

=

1
‌
1
2
‌
1
3
‌
2
3

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