Question
cot 17˚
src='https://static.ixambee.com/public/images/quesimg/Question Bank/Quantitative Aptitude/Trigonometry/83190_3055939.gif'> cot 18˚ …………………….cot 72˚ cot 73˚ = ?Solution
We know that If cotA cotB = 1 then A & B are complementary angles it means A + B = 90˚ cot 17˚
cot 18˚
…………………….cot 72˚
cot 73˚ = (cot 17˚
cot 73˚ )
(cot 18˚
cot 72˚ )
…………………….(cot 44˚
cot 46˚ )
cot 45˚ = 1
1
………………………………………………………………..
1
1 = 1
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