Science

Math

Humanities

... and beyond

Socratic Meta
Featured Answers

Topics

How do you find the exact value of $arc cos (-sqrt2/2)$ ?

1 Answer

May 7, 2015

Trig conversion table gives: $cos ((3pi)/4) = (-sqr2)/2$ . Then

$arc cos (-(sqr2)/2) = (3pi)/4$

Related questions

See all questions in Basic Inverse Trigonometric Functions

Impact of this question

3239 views around the world

You can reuse this answer
Creative Commons License