Differential EquationHard

Question

In a ᐃABC, a/b = 2 + √3 and ⎳C = 60º. Then the ordered pair (⎳A, ⎳B) is equal to :

Options

A.(45o, 75o)
B.(47o, 45o)
C.(105o, 15o)
D.(15o, 105o)

Solution

  ∴  
tan cot 30o = 1
= 45 ⇒ A + B = 120 A = 105o, B = 15o

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