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Trigonometric relations
Questions (1)
If α and β are two angles in Quadrant II such that tan α= -1/2 and tan β = -2/3, find cos(α+β)
Work: cos(α+β) = [ 1 -
6 answers
asked by
Sophie
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Subcategories (1)
Addition and Subtraction Formulas
Parent Categories (1)
Trigonometry
