College Math MCQs – Certification Test 421

Basic Trigonometry Formulas Trivia (Question 421) – App & e-Book Download

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MCQ: 421

Cot(α - β) =

cotα-cotβ/1 + cotαcotβ
cotα+cotβ/1-cotαcotβ
cotαcotβ-1/cotα+cotβ
cotαcotβ+1/cotα+cotβ

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