Trigonometric EquationHard
Question
is -Options
A.0
B.
+ tan-1(2)
+ tan-1(2)C.cot-1(3)
D.
Solution
Tr = tan-1 
= tan-1
Tr = tan-1((r + 1) (r + 3)) - tan-1(r(r + 2))
T1 = tan-1(8) - tan-1(3)
T2 = tan-1(15) - tan-1(8)
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Tn = tan-1((r + 1) (r + 3)) - tan-1(r(r + 2))
Sn = cot-13
= tan-1
Tr = tan-1((r + 1) (r + 3)) - tan-1(r(r + 2))
T1 = tan-1(8) - tan-1(3)
T2 = tan-1(15) - tan-1(8)
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Tn = tan-1((r + 1) (r + 3)) - tan-1(r(r + 2))
Sn = cot-13
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