

Giải phương trình:
a) [tex]Sin3x-cos\left ( bi-3x \right )=\sqrt{2}cos2x[/tex]
b) [tex]2sin^{2}x + \sqrt{3}sin2x = 3[/tex]
c) [tex]2sin^{2}\left ( x-\frac{bi}{4} \right )=2sin^{2}x-tanx[/tex]
d) [tex]\frac{1+cot2x.cotx}{cos^{2}x}+2.\left ( sin^{4}x+cos^{4}x \right )=3[/tex]
a) [tex]Sin3x-cos\left ( bi-3x \right )=\sqrt{2}cos2x[/tex]
b) [tex]2sin^{2}x + \sqrt{3}sin2x = 3[/tex]
c) [tex]2sin^{2}\left ( x-\frac{bi}{4} \right )=2sin^{2}x-tanx[/tex]
d) [tex]\frac{1+cot2x.cotx}{cos^{2}x}+2.\left ( sin^{4}x+cos^{4}x \right )=3[/tex]