![Calculator stiintific Citizen SR-270N, 12 digiti, 240 functii incorporate, 154x80mm, cu carcasa de protectie, negru - eMAG.ro Calculator stiintific Citizen SR-270N, 12 digiti, 240 functii incorporate, 154x80mm, cu carcasa de protectie, negru - eMAG.ro](https://s13emagst.akamaized.net/products/30422/30421770/images/res_aa5b144afd45b5f0c04563f1ba249b7c.jpg)
Calculator stiintific Citizen SR-270N, 12 digiti, 240 functii incorporate, 154x80mm, cu carcasa de protectie, negru - eMAG.ro
Why are the cos-1 and sin-1 functions not working on my calculator? The answer always comes up as a math error and I don't know why. I'm definitely inputting everything right. -
![Fix scientific calculator issue. change settings from radians to degree. values of sin, cos or tan - YouTube Fix scientific calculator issue. change settings from radians to degree. values of sin, cos or tan - YouTube](https://i.ytimg.com/vi/dcRjf9wCJqA/maxresdefault.jpg)
Fix scientific calculator issue. change settings from radians to degree. values of sin, cos or tan - YouTube
![Using the Sin, Cos and Tan FUNCTINs on the scientific calculator#trigonometry #significantfigures - YouTube Using the Sin, Cos and Tan FUNCTINs on the scientific calculator#trigonometry #significantfigures - YouTube](https://i.ytimg.com/vi/Iw1KwGDUFIw/hqdefault.jpg)