Question

Cos x = 0.4

whats x
?????????

Answer 1

Answer: x = 66.42

Step-by-step explanation: cos x = 0.4

x= cos-1(0.4)

x= 66.42

Answer 2

Hello!

Answer:

`\Large \boxed{\sf x \approx 66.42^(\circ)}`

Explanation:

We want to find x:

`\sf cos (x )= 0.4`

Let's use the inverse cosine function, called arccosine:

`\sf x = arccos(0.4)`

Simplify:

`\boxed{\sf x \approx 66.42^(\circ)}`

Conclusion:

x is equal to 66.42°.