Javascript Disabled Detected

You currently have javascript disabled. Several functions may not work. Please re-enable javascript to access full functionality.

Calculating Error

Started by Toopz , May 20 2016 03:46 PM

Please log in to reply

4 replies to this topic

#1 Toopz

Newbie

Members
2 posts

Calculators:
Casio 9860g

Posted 20 May 2016 - 03:46 PM

I have a 9860g and my son was using it to solve trigonometry equations. When used the cos tan and sine functions the answers came up totally different and wrong to the answer I received using another calculator I checked it several times as to why cos 45 answer on my 9860g was different to the cos45 answer I got on another calculator . Can some one please explain why this has occurred. Any help will be appreciated

Back to top

#2 frankmar98

Casio Freak

Moderator
127 posts

Gender:Male
Location:Spain
Interests:Science, programming
Calculators:
CFX-9970G
Graph 90+E (fx-GC50)
fx-9860G SD
Classpad 300
HP Prime
TI-84+ CE-T
x2 TI-83+
TI-81
fx-4800p, fx-3650PII
fx-991SPX, fx-991ES PLUS, fx-100W

Posted 20 May 2016 - 04:25 PM

Check the angle mode, for calculate the cos of 45 degree.

Also you have to know that equations containing trigonometry functions usually have infinite solutions

Back to top

#3 Toopz

Newbie

Members
2 posts

Calculators:
Casio 9860g

Posted 20 May 2016 - 10:53 PM

Thanks for the reply what's angle mode
Thanks what is angle mode
Thanks what is angle mode

Back to top

#4 Viliami

Casio Addict

Moderator
99 posts

Gender:Male
Location:New Zealand
Interests:C++ - OpenGL,SDL
Python - Pygame
Java - SFML
C - Casio SDK
Calculators:
FX-9750 GII upgraded to FX-9860 GII

Posted 21 May 2016 - 08:52 AM

On the fx-9860gii you can change the angle mode to: degrees, radians, or gradians.

Degrees are the most common measurement, 360 degrees make up a full circle.

Radians are also common in High School maths and beyond, 2π radians make up a full circle.

Gradians are not so common, gradians are equal to 9/10ths of a degree. 400 gradians make up a full circle.

To switch the angle mode between degrees, radians or gradians press Shift, MENU and then scroll down to Angle:, then press F1 for Degrees, F2 for Radians or F3 for Gradians.

Edited by Viliami, 21 May 2016 - 08:53 AM.