The value of tan lº tan 20 tan 3° ... tan 89° is??
(1) 0
(2) 1
(3) -1
(4) 2
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Answer:
tan 1 tan 89 tan 2 tan 88 tan 3 tan 87.......tan 45=
tan 1 cot 1 tan 2 cot 2 tan 3 cot 3......tan 45= 1
2nd option correct.
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