1.

Suppose the area of the ΔABC is 10√3 . Length of segments AC and AB be 5 and 8 respectively. Then the angle A is (are) :(A)   45°  or 135° (B)   30° or 150°(C)   90° (D)   60° or 120°

Answer»

Correct option (D) 60° or 120°

Explanation:

Let sides A B , BC & A C be c,a,b respectively in  ΔABC .

Area of triangle =1/2 bc sin A 

⇒ 10√3 = 1/2 5.8 sin A 

sin A  = √3/2

∴ 60° or 120°



Discussion

No Comment Found

Related InterviewSolutions