Question

Express cos A in terms of sin A.​

Answer 1

Answer:

The answer is $\cos A=\sqrt{1-\sin^2A}$

Step-by-step explanation:

Since we know $\sin^2A+\cos^2A=1$

                         $\Rightarrow \cos^2A=1-\sin^2A$

                        $\Rightarrow \cos A=\sqrt{1-\sin^2A}$