You can put this solution on YOUR website! (1 + sin x + cos x)^2 = 2(1 + sin x)(1 + cos x)
How do I solve one side of this equation?
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set right side=0
2(1 + sin x)(1 + cos x)=0
..
1+sinx=0
sinx=-1
x=3π/2
or
1+cosx=0
cosx=-1
x=π
solutions: x=π, 3π/2