Question

if cos A =1/2 then evaluate sin square A​

Answer 1

Answer:

Step-by-step explanation:

cos A =1/2

cos² A= (1/2)² =1/4

cos²A+sin²A =1

1/4 +sin²A =1

sin²A =3/4

Answer 2

Answer:

Step-by-step explanation:

Given,

cos A = 1/2

We know that sin^2 A + cos^2 A = 1

Now substituting cos A value in the above equation, we get

sin^2 A = √1 - cos ^2 A

sin^2 A = √1 - (1/2)^2

sin^2 A = √1- 1/4 ⇒ sin^2 A = √4-1/4 ⇒ sin^2 A = √3/4 is the answer