TS EAMCET 04 May 2019 Shift 1 Solved Paper

Section: Mathematics
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Question : 24 of 160
 
Marks: +1, -0
For a > 0 , if f (x) = ax + b is an onto function from [- 1 , 1] to [0 , 2], then cot [tan−1
1
7
+tan−1
1
8
+tan−1
1
5
]
=
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