cos(2tan-1(1/7)
(A) sin(4cot-1(3)
(B) sin(3cot-1(4)
(c) cos(3cot-1(4)
(d) cos(4cot-1(4)
Answers
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I think that you have to go with the option c
amangoyal0438:
how
it's tan inverse
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B hoga answer wwsuuuddiffif
wrong
The answer is a but we wanted to know the method
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