324,603 views
45 votes
45 votes
2. Solve (and show your work) using the inverse cosine function:cos(x) = 0.4for at least one angle x.

User Killerpixler
by
2.7k points

1 Answer

28 votes
28 votes

ANSWER


x=66.4^o

Step-by-step explanation

We want to use the inverse cosine function to find the value of x.

If the cosine of an angle is:

cos(x) = a

then, the inverse cosine function is:


\cos ^(-1)(a)\text{ = x}

So, we have that:


\begin{gathered} \cos ^(-1)(0.4)\text{ = x} \\ \Rightarrow x=66.4^o \end{gathered}

That is the answer.

User Edvard Pedersen
by
2.9k points
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