Question

50 marks

In a ∆ ABC, right-angled at C, AC = 6 cm and AB = 12 cm. Find ∠ A. CBSE Mathematics

Answer 1

In ∆ABC ,

<C = 90°

AB = 12 cm ,

AC = 6 cm

CosA = AC/AB

= 6/12

= 1/2

=> Cos A = cos 60°

=> A = 60°

••••

Answer 2

$\mathfrak{The\:Answer\:is}$


AC = 6 cm and AB = 12 cm

cos theta = AC/AB = 6/12 = 1/2

Therefore,

cos 60° = 1/2

=> Angle A = 60°

$\boxed{Hope\:This\:Helps}$