Question

if Sin A is equals to 1 by 3 then find cos A​

Answer 1

Answer:

cos A =

$2 \sqrt{2} \div3$

Step-by-step explanation:

There are two ways of solving this question.

I have done it in one method.

The explanation is in the attachment.

Answer 2

Answer:

cosA= $2\sqrt{2}/3$

Step-by-step explanation:

Side AB=

$\sqrt{3^2-1^2}\\\sqrt{8} \\=2\sqrt{2}\\cosA= 2\sqrt{2}/3$