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AP EAMCET202119 Aug 2021Morning ShiftMathematicsProperties of TrianglesActual

In a triangle A B C , if a = 3 , b = 4 and sin A = 3 4 then ∠ C B A = ?

Options

  1. A60 ∘
  2. B75 ∘
  3. C90 ∘
  4. D45 ∘

Correct answer

C. 90 ∘

Step-by-step solution

Here given that, In a triangle A B C , a = 3 ,   b = 4 and sin A = 3 4 Using Sine Rule, we know that sin A a = sin B b ⇒ 3 4 3 = sin B 4 ⇒ sin B = 1 ⇒ B = 90 ° ( ∵ sin 90 ° = 1 ) ⇒ ∠ C B A = 90 °

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