The value of tan1° tan2° .........tan89°is
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Step-by-step explanation:
tan1°tan2°........tan88°tan89°
=tan1°tan2°.........tan(90-2)tan(90-1)
=tan1°tan2°........cot88°cot89°
=tan1°cot1°tan2°cot2°.........tan45cot45
=1
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