Question

Find the exact real value of arccos((square root of 2)/2)

Answer 1

\[\arccos \left( \frac{ \sqrt{2} }{2 } \right)\]

Answer 2

arccos x = cos^-1 (x)
now what you will do .
just use your calculator
first press shift button then go to the cos^-1 sign button then press these values you willl get your answer

Answer 3

But how do I do it without the use of calculator? :)

Answer 4

well first you will divide sqrt 2 and 2
you will get 0.706
and now as you know the table of trigonometry
there is cos 45= 0.707
So, we get it will be at 45 degrees.

Answer 5

45 degrees or pi/4, right?

Answer 6

45 is degree, but when we express its answer in radians we will say pi/4
Good job girl @mathway

Answer 7

yeap

Answer 8

Thank you @Haseeb96 !

Answer 9

Most welcome @mathway
I am glad that i helped you in your problem :)

Answer 10

Do you have more questions ? if so tag me

Answer 11

I'll open a new question. :)

Answer 12

fine