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Adam · 12-15-2009

I need help with a math problem.
I have solved an equation like this:

Code:

2sin(3x + 18) = 2^½ 
sin(3x + 18) = (2^½)/2 = sin(45) 
1/sin(sin(3x + 18)) = 1/sin(sin(45)) 
3x+18 = 45 
3x = 45-18 = 27 
x=9

My teacher said that there should be more solutions and that I should take the domain in consideration.
The domain is: 𝟎≤𝒙≤𝟑𝟔𝟎

I hate and suck at trigonometry, help is really appreciated

12-15-2009	#1
Adam Registered Member Last Online: 06-03-2013 Join Date: Feb 2008 Posts: 1,410 Thanks: 1,444 Thanked 1,235 Times in 689 Posts Groans: 25 Groaned at 21 Times in 19 Posts	Math help I need help with a math problem. I have solved an equation like this: Code: 2sin(3x + 18) = 2^½ sin(3x + 18) = (2^½)/2 = sin(45) 1/sin(sin(3x + 18)) = 1/sin(sin(45)) 3x+18 = 45 3x = 45-18 = 27 x=9 My teacher said that there should be more solutions and that I should take the domain in consideration. The domain is: 𝟎≤𝒙≤𝟑𝟔𝟎 I hate and suck at trigonometry, help is really appreciated