Question

Explain why cos (cos^-1 (3) ) does NOT equal 3.

Answer 1

what is cos^-1 (3)

Answer 2

What do you mean?

Answer 3

what value of x makes cos(x) = 3 true

Answer 4

uh...its undefined. it isnt within the domain.

Answer 5

oh....oooooohhhhhhhhhhhhhh. wait~! no...

Answer 6

cos(x) = 3 isn't possible since the range of cosine is [-1, 1]

Answer 7

\[\cos(x)\neq3\]

Answer 8

so that's why cos^-1 (3) is undefined

Answer 9

i love you.

Answer 10

lol glad to be of help