# NSolve cos(x°) inconsistency between NSolve button and NSolve command

CAS: Using the graphical NSolve button produces another result than the NSolve command.

Equation: cos(x°)=1/3

Result with NSolve button: {x=2230.53}

Result with Nsolve(cos(x°)=1/3): {x=-70.53,x=70.53}

Version: 6.0.631.0-offline (09 March 2021). Norwegian language.

Steps to reproduce:

1. Enter cos(x°)=1/3. Click NSolve button.

Result: {x=2230.53}. Step 1 in attached picture.

2. Click the line with cos(x°)=1/3. Press Enter.

Result: {x=-70.53,x=70.53}

3. Enter NLøs(cos(x°)=1/3). Press Enter.

Result: {x=-70.53,x=70.53}

Two problems:

Expected NSolve button and NSolve command to give the same small angle(s).

Expected pressing Enter on an existing line to not produce a similar but different result, but either showing the equation, or evaluating in the same way as the first time the equation was entered.

Possibly a variant of the same problem? (NLøs is norwegian for NSolve)

When AC was set to the value 2.87, the NSolve button gives both solutions, but not in line 1 when 2.87 was entered as a number:

Also very strange: Line 1 changed from nicely formatted fractions to slashes and parentheses after evaluating line 3 with the NSolve button...

The button has to guess between these syntaxes - if it doesn't give the "right" one then you'll need to enter it manually

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