If arctan(tanα) = -2π/7 Which of the following values can have α have?
a) -9π/7
b) 2π/7
c) -5π/7
d) 5π/7
Answer:-
arctan(x) is same as tan-1(x)
Graph of tan-1( )
We have given
According to question , we can have values of as follows
(1)
(2)
(3)
We got
So , in the given question options (a) and (d) are possible.
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