Science

Math

Humanities

... and beyond

Socratic Meta
Featured Answers

Topics

What is $sin [2 Tan^-1 (-2)]$ ?

1 Answer

Mar 7, 2018

-0.8

Explanation:

tan x = - 2
Calculator gives -->
arc $x = - 63^@4349$
$2x = -126^@87$
$sin 2x = sin (- 126.87) = - 0.8$

Related questions

See all questions in Basic Inverse Trigonometric Functions

Impact of this question

1599 views around the world

You can reuse this answer
Creative Commons License