- #1
powp
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Is this correct??
Hello All
I need to find all solutions to the following did i do it correct?
Sin 2x = 2Tan 2x
2Sinx Cosx = 2(2Tanx / 1-Tan^2x)
Sinx Cosx = (2(Sinx / Cosx)/(cos^2x-Sin^2x / Cos^2x))
Sinx Cosx = 2(Sinx / Cosx) X (Cos^2x / cos^2x-Sin^2x)
Cosx = 2 (Cosx / Cos^2x - Sin^2x)
1 = (2 / Cos^2x - Sin^2x)
Cos^2x - Sin^2x = 2
1 - Sinx^2 - Sin^2x = 2
2Sin^2x = -1
Sin^2x = -1/2
Sinx = -1/SQROOT(2)
Is this correct??
Hello All
I need to find all solutions to the following did i do it correct?
Sin 2x = 2Tan 2x
2Sinx Cosx = 2(2Tanx / 1-Tan^2x)
Sinx Cosx = (2(Sinx / Cosx)/(cos^2x-Sin^2x / Cos^2x))
Sinx Cosx = 2(Sinx / Cosx) X (Cos^2x / cos^2x-Sin^2x)
Cosx = 2 (Cosx / Cos^2x - Sin^2x)
1 = (2 / Cos^2x - Sin^2x)
Cos^2x - Sin^2x = 2
1 - Sinx^2 - Sin^2x = 2
2Sin^2x = -1
Sin^2x = -1/2
Sinx = -1/SQROOT(2)
Is this correct??