Science

Math

Humanities

... and beyond

Socratic Meta
Featured Answers

Topics

How do you solve $cos C = 0.7771$ $cosC = 0.7771$ ?

1 Answer

Jul 17, 2016

In $(0<=C<=2pi):. /_C=39^0,321^0$

Explanation:

$cosC=0.7771 :. /_C=cos^-1(0.7771)=39.0^0$ . Cos is also positive in 4th quadrant. In $(0<=C<=2pi):. /_C=(360-39)=321^0,39^0$ [Ans]

Related questions

See all questions in Solving Trigonometric Equations

Impact of this question

2063 views around the world

You can reuse this answer
Creative Commons License