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A level maths trigonometry watch

1. Solve the following equations
1)2sin^2 (2x) = root 2 (sin2x)
2)3tanx =1/cosx
3) 6sin^2 x -7sinx = -2
4) 3tan2x =1/tan2x
2. (Original post by Wiktoria_Ok)
Solve the following equations
1)2sin^2 (2x) = root 2 (sin2x)
2)3tanx =1/cosx
3) 6sin^2 x -7sinx = -2
4) 3tan2x =1/tan2x
What have you tried?

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