SOLUTION: FIND ALL DEGREE SOLUTIONS: sin x + cos (2x)= 0

Question 743919: FIND ALL DEGREE SOLUTIONS:
sin x + cos (2x)= 0
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
sin x + cos (2x)= 0

(2sin(x)+1)(sin(x)-1)=0
2sin(x)+1=0
sin(x)=-1/2
x=210�+360n, 330�+360n,n=integer (Q3 and Q4 where sin<0)
or
sin(x)-1=0
sin(x)=1
x=90�+360n, n=integer
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