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Another contributor says:
Yes, x=0 is a solution, but there are a lot more.
sin(2x) = sin(x) whenever
x = (N pi) radians
or
x = (2N-1) pi / 3 radians.
1 radian = 57.3 degrees (rounded)
Make ' N ' any whole number you want.
The first cycle of angles are:
X = pi/3, pi, 5 pi/3, 2 pi radians
or 60, 180, 300, 360 degrees.
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to simplify Cosx=Sinx Tanx you should remember your fundamental and pythagorean identities.. Cosx + Sinx Tanx Cosx + Sinx (Sinx/Cosx) <---------- From Tanx= Sinx/Cosx Cosx + Sin2x/ Cos x <------------- do the LCD Cosx (Cosx/Cosx) + Sin2x/Cosx (Cos2x+Sin2x)/Cosx 1/Cosx <--------- From Sin2x + Cos2x =1 or Secx <-------- answer Comment if you have questions...:))
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How do you solve 2sinxsinx equals 1?
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How do you solve 2 cos squared x - sinx - 1?
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