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Trigonometric Identities Section

  • Thread starter Paomaui
  • Start date
  • #1
1
0

Homework Statement



3sinx = 1 + cos 2x


Homework Equations



N/A

The Attempt at a Solution



3sinx = 1+1 - 2sin2x (Trigonometric Identity)
3sinx = 2-2sin2x
2sin2x + 3sinx = 2

I do not know where to go from there.
My book tells me the answer is 30o and 150o

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
445
5
What happens when you take 2 away from both sides?
 

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