The value of tan1∘ tan2∘ tan3∘......tan89∘ is
0
1
2
4
tan1∘ tan2∘.................tan89∘
= tan1∘ tan2∘.................cot2∘cot1∘
= 1
The value of tan1∘ × tan2∘ × tan3∘ ×…...× tan 89∘ is :