In ∆ A B C ; with usual notations, if cos ⁡ A = sin ⁡ B sin ⁡ C , then, the triangle is ________

Question

In ∆ A B C ; with usual notations, if cos ⁡ A = sin ⁡ B sin ⁡ C , then, the triangle is ________, acute angled triangle, equilateral triangle, obtuse angled triangle, right angled triangle

MARKS App · Accepted Answer

Given cos ⁡ A = s i n B s i n C b 2 + c 2 - a 2 2 b c = b c ⇒ a 2 + b 2 = c 2 Pythagoras theorem) then ∆ A B C is right angle triangle.

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