KCET 2011 Math Solved Paper

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Question : 8 of 60

Marks: +1, -0

In any triangle ABC, the simplified form of ‌

Cos‌2‌A

a2

−‌

Cos‌2‌B

b2

is ....................

a2−b2
‌
1
a2−b2
‌
1
a2
−‌
1
b2
a2+b2

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