Question

Seno al cuadrado de x - coseno al cuadrado de x=0...por fa con esta última

Answer 1

${sen^2x-cos^2x=0}\\\\{sen^2x-(1-sen^2x)=0}\\\\{sen^2x-1+sen^2x=0}\\\\{2sen^2x-1=0}\\\\{2sen^2x=1}\\\\{sen^2=\frac{1}{2}}\\\\{senx= \sqrt{\frac{1}{2}} }\\\\{senx= \frac{\sqrt{1}}{\sqrt{2}}}\\\\{senx= \frac{1}{\sqrt{2}}}\\\\{x=sen^{-1}\left( \frac{1}{\sqrt{2}} \right)}\\\\{\boxed{x=45^{\circ}}}\\\\{\mathbf{salu2.!!}\text{ :)}$