The value of the below expression is tan1∘.tan89∘.tan2∘.tan88∘
A
0
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B
1
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C
2
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D
Not defined
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Solution
The correct option is B 1 The given expression is tan1∘.tan89∘.tan2∘.tan88∘ ∵tanθ=cot(90−θ) ⇒tan1∘.cot1∘.tan2∘.cot2∘ ∵tanθ=1cotθ ∴tan1∘.cot1∘.tan2∘.cot2∘=1