Question

determina el valor de X: sen(2x-30°)=cos(3x+20°)

Answer 1

Respuesta:

20°

Explicación paso a paso:  

cosx=1/secx

sen(2x-30°)=cos(3x+20°)→sen(2x-30°)=1/sec(3x+20°)→sen(2x-30°)*sec(3x+20°)=1

por formula sena*secb=1→a+b=90°→2x-30°+3x+20°=90°→5x-10°=90°→5x=100°

x=20°