- #1
PlayingCatchUp
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I have probably put around two hours into this question to no avail!
6sin2(x) - 3sin2(2x) + cos2(x)=0
I have too many fruitless attempts to bother typing them all out.. But my instincts at first told me that this looks like a quadratic equation.
I have tried using the double angle identity on the 2nd term to get:
6sin2(x) - 12sin2(x)cos2(x) + cos2(x) = 0 but beyond that I am just messing with identities with no solution in sight.
Also merging the first and third terms to get :
5sin2(x) -12sin2(x)cos2(x) + 1 =0
And much more..
Please help!
The answer according to my textbook is +-35.26° +-n360°, +-30° +-n360°
6sin2(x) - 3sin2(2x) + cos2(x)=0
I have too many fruitless attempts to bother typing them all out.. But my instincts at first told me that this looks like a quadratic equation.
I have tried using the double angle identity on the 2nd term to get:
6sin2(x) - 12sin2(x)cos2(x) + cos2(x) = 0 but beyond that I am just messing with identities with no solution in sight.
Also merging the first and third terms to get :
5sin2(x) -12sin2(x)cos2(x) + 1 =0
And much more..
Please help!
The answer according to my textbook is +-35.26° +-n360°, +-30° +-n360°
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