richysantos
richysantos richysantos
  • 13-02-2017
  • Mathematics
contestada

Solve the equation sin (x° - 20°) = cos 42° for x, where 0 < x < 90.

a.62
b.22
c.68
d.28

Respuesta :

kanifaabu123
kanifaabu123 kanifaabu123
  • 13-02-2017
in my opinion is c

i hope it will help
 
Answer Link
lublana
lublana lublana
  • 17-09-2019

Answer:

c.68

Step-by-step explanation:

We are given that

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

We have to solve for x

[tex]sin(x-20)=cos (90-48)[/tex]

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

[tex] cos (90-\theta)=sin\theta[/tex]

Cancel sin on both sides then we get

[tex]x-20=48[/tex]

[tex]x=48+20=68[/tex]

Hence, the value of x=68

Answer:c.68

Answer Link

Otras preguntas

Please help this is too hard for me
Estimate 2/9 * 88 explain
(x + f) + 2 = j Solve for x I really need help please!!
Triangle Abc is right triangle, and the measure of angle A is 28 percent what are the measure of two angles
Simplify the expression 6X + 12 y + 5 + 2y + 8
how was the Cherokee leadership divided over the issue of taking sides during the civil war
CH4 + CL2 -> CCL4 + HCL what element has subscripts 4?
What literary form is this story an example of?
Why isn't a different base broth required for each decarboxylase test?
what would be the address of the cell, which is intersect of the second row and third column in a worksheet