Question

In ∆ABC, /_B = 90º, AC = 12 cm, BC = 6 cm. Find measure of /_A​

Answer 1

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Answer 2

Given : ΔABC

∠B = 90°

AC = 12 cm

BC = 6 cm

To Find :  measure of ∠A

Solution:

ΔABC

∠B = 90°

AC = 12 cm

BC = 6 cm

Sin ∠A      =  BC / AC

=> Sin ∠A = 6/12

=> Sin ∠A  = 1/2

=> Sin ∠A  = Sin 30°

=> ∠A  = 30°

measure of  ∠A is 30°

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