Question

3cos^2x=sen^2x en el intervalo (0.2 TT)

Answer 1

Sabes que cos^2(x) = 1-sen^2(x)

3(1-sen^2(x))=sen^2(x)

3-3sen^2(x)=sen^2(x)

3= 4sen^2(x)

sen^2(x)=3/4

x=arcsen(raíz(3/4))
x= pi/3
x= 5pi/3