Giải các phương trình lượng giác sau
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c) \(\tan(3x + \frac{\pi}{2}) \cdot \cot(5x + 1) = 0\)
d) \(\sin(x - 45^\circ) = \cos2x\)
e) \(\tan(2x - 15^\circ) - 1 = 0\)
f) \(\sin2x = \cos(\frac{x - 2\pi}{3})\)
g) \(\sin(\frac{x + \pi}{3}) = \cos2x\)
h) \(\tan2x + \cot3x = 0\)
i) \(\sqrt{3} \tan(2x + \frac{\pi}{3}) = -3\)
j) \(2/\sqrt{2} \sin(2x + \frac{\pi}{3}) = 2\)
k) \(2\sqrt{3} \cos(3x + \frac{\pi}{3}) - 3 = 0\)
l) \(3\cot(\frac{3\pi}{2} - x) + \sqrt{3} = 0\)
m) \(\tan(\frac{6\pi}{5} - 3x) \cdot \cot(2x + \frac{\pi}{4}) = 0\)
n) \(\tan(3x + \frac{\pi}{2}) \cdot (\cos2x - 1) = 0\)
o) \((\cos(3x + \frac{\pi}{2}) + 1) \cdot \sin(x + \frac{\pi}{5}) = 0\)
p) \(6\cos(4x + \frac{\pi}{5}) + 3\sqrt{3} = 0\)
q) \(\cos(\frac{x - \pi}{3}) = \frac{1}{2}\)
r) \(\sin(3x - \frac{\pi}{4}) - \cos(x + \frac{2\pi}{3}) = 0\)
DÁNG: GIẢI PHƯƠNG TRÌNH LƯỢNG GIÁC CƠ BẢN
c) \(\tan(3x + \frac{\pi}{2}) \cdot \cot(5x + 1) = 0\)
d) \(\sin(x - 45^\circ) = \cos2x\)
e) \(\tan(2x - 15^\circ) - 1 = 0\)
f) \(\sin2x = \cos(\frac{x - 2\pi}{3})\)
g) \(\sin(\frac{x + \pi}{3}) = \cos2x\)
h) \(\tan2x + \cot3x = 0\)
i) \(\sqrt{3} \tan(2x + \frac{\pi}{3}) = -3\)
j) \(2/\sqrt{2} \sin(2x + \frac{\pi}{3}) = 2\)
k) \(2\sqrt{3} \cos(3x + \frac{\pi}{3}) - 3 = 0\)
l) \(3\cot(\frac{3\pi}{2} - x) + \sqrt{3} = 0\)
m) \(\tan(\frac{6\pi}{5} - 3x) \cdot \cot(2x + \frac{\pi}{4}) = 0\)
n) \(\tan(3x + \frac{\pi}{2}) \cdot (\cos2x - 1) = 0\)
o) \((\cos(3x + \frac{\pi}{2}) + 1) \cdot \sin(x + \frac{\pi}{5}) = 0\)
p) \(6\cos(4x + \frac{\pi}{5}) + 3\sqrt{3} = 0\)
q) \(\cos(\frac{x - \pi}{3}) = \frac{1}{2}\)
r) \(\sin(3x - \frac{\pi}{4}) - \cos(x + \frac{2\pi}{3}) = 0\)
DÁNG: GIẢI PHƯƠNG TRÌNH LƯỢNG GIÁC CƠ BẢN