JEE Advanced 2020 Concept Recapitulation Test 4 Paper 2

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Question : 53 of 54

Marks: +1, -0

If

∞

∑

n=0

tan−1(‌

cot−1(n2+3n+3)

1+cot−1(n+1)cot−1(n+2)

)=tan−1(‌

p

4

) then find the value of cos−1(cos(p−1) [Use: π=3.14]

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