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December 18, 2014

December 18, 2014

Posted by **help!** on Saturday, September 19, 2009 at 2:21am.

- Trigo! -
**MathMate**, Saturday, September 19, 2009 at 7:23amYou have done the right step, check your answers after you have squared each side of an equation.

Take a simple case of

x=-4

square both sides,

x²=(-4)²=16

x=√16=±4

check:

x=-4 OK

x=+4 not a solution.

In your case, the solution of 73.126° is correct. The other one is false.

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