How do you use a calculator to evaluate cos10.24 in both radians and degree?

2 Answers
Jun 2, 2018

76.113 and/or 76133π180000

Explanation:

First i would get the degree by doing cos1(0.24) in a calculator to get 76.113
This is 76.133 out of 360 which is 76.133360
Radians is out of τ or 2π To find out radian multiply the fraction by τ or 2π to get:
76.1333602π=152.266π360=76133π180000

Jun 3, 2018

x=76,or19π45
x=284,or71π45

Explanation:

cos1(0.24) --> arccos (0.24)
Calculator and unit circle give -->
cos x = 0.24 -->
arc x=±76
For (0,360) the answers are:
x=76 and
x=284 (co-terminal to 76)
Convert to radians:
x=76 --> x=76π180=19π45.
x=284 --> x=284π180=71π45