JEE Main 2019 Mathematics question
Not in JEE syllabus
Given for a ΔABC with usual notation. If , then the ordered triad (α, β, γ) has a value:
Answer: (B)
Solution
a : b : c = 7 : 6 : 5 ⇒ cos A = 1/5, cos B = 19/35, cos C = 5/7 ⇒ 7 : 19 :
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