Question

If CosA
= 4/5
then find the value of
tanA & sin A​

Answer 1

Answer:

Here is your answer in the image attached

Answer 2

Answer:

Step-by-step explanation:

Given that cos A = 4/5 ,

As we know,

sin² A + cos² A = 1 ,

sin² A + (4/5)² = 1 ,

sin² A + 16/25 = 1 ,

sin² A = 1 – 16/25

sin² A = (25–16) / 25 ,,

sin² A = 9/25 ,

sin A = $\sqrt 9/25$.

sin A = 3/5

Now, tan A = sin A ÷ cos A

= 3/5 ÷ 4/5

= 3/4.

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