Question

You should be able to find this
without a calculator.
cos(cos-¹ 0.3) = [?]

Answer 1

`\frak{Hi!}`

`\large\text{Related Concept-:}`

`\boxed{\begin{minipage}{10cm} \sf{If\;you\;take\;the\;inverse\;cosine}\\ \;of\;a\;number,\;and\;then\;take\; its\;cosine,\;don't\;you\;get\;the\;number \\ you started with? \end{minipage}}`

Clarification

The inverse cosine and the cosine are operations that undo each other.

This being said, let's solve our problem.

`\bf{cos(cos^(-1)\;0.3)=0.3`, based on what I said above

`\cal{CALLIGRAPHY}`

Answer 2

Hello:

Let's consider this problem in steps:

Let's gather some information:

• cosine and arccosine cancel each other out in this case

Now let's apply our knowledge to solve the problem:

`\rm \hookrightarrow cos(cos^(-1)0.3) = 0.3`

Answer: 0.3

Hopefully that helps!