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JEE Advanced Model Paper 13 with solutions for online practice

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In a ΔABC ; BC = a , CA = b , AB = c . R is circum radius and r is in radius and s issemi perimeter and (cot
A
2
)2 + (2cot
B
2
)2 + (3cot
C
2
)2 = (
6s2
7Δ
)2 , where Δ is the area of ΔABC . Then answer the following
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Question : 60
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