garciale001 garciale001
  • 14-12-2021
  • Mathematics
contestada

Solve the equation sin(S - 20%) = cos(429) for x, where 0 ОА.
68
OB
28
ОС,
62
OD 22

Solve the equation sinS 20 cos429 for x where 0 ОА 68 OB 28 ОС 62 OD 22 class=

Respuesta :

goddessboi goddessboi
  • 14-12-2021

Answer:

A) [tex]68[/tex]

Step-by-step explanation:

[tex]sin(x^\circ-20^\circ)=cos(42^\circ),0<x<90[/tex]

[tex]sin(x^\circ-20^\circ)=cos(42^\circ)[/tex]

[tex]sin(x^\circ-20^\circ)=sin(90^\circ-42^\circ)[/tex]

[tex]sin(x^\circ-20^\circ)=sin(48^\circ)[/tex]

[tex]x^\circ-20^\circ=48^\circ[/tex]

[tex]x^\circ=68^\circ[/tex]

Helpful Tips:

Cofunction Identity --> [tex]sin(90^\circ-x^\circ)=cos(x^\circ)[/tex]

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