kierralegner kierralegner
  • 24-10-2017
  • Mathematics
contestada

Solve the question sin(x - 20) = cos(42) for x, where 0 , x , 90.
62
22
28
68

Respuesta :

chi3fcomm5nd
chi3fcomm5nd chi3fcomm5nd
  • 24-10-2017
you need to use the identity
cos(90-u)=sin(u)
if u=x-20
cos(90-x+20)=sin(x-20)
cos(110-x)=sin(x-20)
substituting in the original function
cos(110-x)=cos(42)
for the functions to be equal there input must be equal
110-x=42
x=68


Answer Link

Otras preguntas

Mary runs M miles a day. Timothy runs twice as many as Mary. Altogether, they run 18 miles each day. How many miles does Mary run each day?
Which expressions are equivalent to 3x + 2(x − 1) − 4?
What is -10>-8(1+6×)-2
Theories can become laws and laws can become theories. Plz help fast!!!!!
Was machst du jetzt?
Answer plz plz plz plz
"Liberty may be endangered by the abuse of liberty, but also by the abuse of power."—James Madison Which of the following statements both relates to the quote
Is the sentence "Mother made sandwiches for her and me." ungrammatical?
what is the definition for " enlightened monarch "
Select the correct location on the image. The diagram shows an unfertilized female sex cell at different locations within the reproductive system. At which loca