Bài 2: Phương trình lượng giác cơ bản
Các câu hỏi tương tự
Giair các pt lượng giác sau:
1) sinleft(x-frac{pi}{4}right)left(2cos+sqrt{2}right)tan2x0
2) tan2x.sinx+3left(sin-sqrt{3}tan2xright)-3sqrt{3}0
3) frac{cos2x}{sinleft(x+frac{3pi}{4}right)}frac{sinleft(x+frac{3pi}{4}right)}{cos2x}
4) left(frac{tanx-1}{tanx+1}+cot2xright)left(3tan-sqrt{3}right)0;0 x pi
Đọc tiếp
Giair các pt lượng giác sau:
1) \(sin\left(x-\frac{\pi}{4}\right)\left(2cos+\sqrt{2}\right)tan2x=0\)
2) \(tan2x.sinx+3\left(sin-\sqrt{3}tan2x\right)-3\sqrt{3}=0\)
3) \(\frac{cos2x}{sin\left(x+\frac{3\pi}{4}\right)}=\frac{sin\left(x+\frac{3\pi}{4}\right)}{cos2x}\)
4) \(\left(\frac{tanx-1}{tanx+1}+cot2x\right)\left(3tan-\sqrt{3}\right)=0;0< x< \pi\)
\(tan\left(\frac{\Pi}{3}-3x\right)+tan2x+tanx=\sqrt{3}\)
\(tan\left(\frac{\Pi}{3}-3x\right)+tan2x+tanx=\sqrt{3}\)
24 tháng 7 2020 lúc 18:22
giải các pt
a) \(cos^2\left(\frac{\pi}{3}+x\right)+4cos\left(\frac{\pi}{6}-x\right)=4\)
b) \(5cos\left(2x+\frac{\pi}{3}\right)=4sin\left(\frac{5\pi}{6}-x\right)-9\)
c) \(2sin^2x+\sqrt{3}sin2x+2\sqrt{3}sinx+2cosx=2\)
d) \(2sin^2x+\sqrt{3}sin2x+4=4\left(\sqrt{3}sinx+cosx\right)\)
20 tháng 7 2020 lúc 21:40
giải pt
a) \(tan\left(x+\frac{\pi}{3}\right)=cot\left(3x-\frac{\pi}{6}\right)\)
b) \(\left(\sqrt{3}-\frac{3}{tanx}\right).tanx=0\)
giải pt
a) \(tanx.tan\frac{\pi}{9}=1+tan\frac{\pi}{9}.tan\frac{\pi}{90}+tanx.tan\frac{\pi}{90};\left(-2\pi< x< 2\pi\right)\)
b) \(tan^22x+\frac{1}{cos^22x}=7;\left(0< x< 360^0\right)\)
c) \(tan^3x+\frac{1}{cos^2x}+4\sqrt{3}\left(1+tanx\right)=8+7tanx;\left(-\pi< x< \pi\right)\)
Giải các phương trình sau:
a, sinx+cosx+1+sin2x+cos2x=0
b, sinx(1+cos2x)+sin2x=1+cos2x
c, \(\frac{1}{sinx}+\frac{1}{sin\left(x-\frac{3\pi}{2}\right)}=4sin\left(\frac{7\pi}{4}-x\right)\)
d, sin4x+cos4x=\(\frac{7}{8}cot\left(x+\frac{\pi}{3}\right)cot\left(\frac{\pi}{6}-x\right)\)
\(\tan\left(\frac{\Pi}{3}-4x\right)+\tan\left(\frac{\Pi}{6}+x\right)+\tan2x=\cot x\)
1) frac{1}{cos x}+frac{1}{sin2x}frac{2}{sin4x}
2) cos3xcdottan5xsin7x
3) tan5xcdottan2x1
4) 4cos x-2cos2x-cos4x1
5) sinleft(2x+frac{5pi}{2}right)-2cosleft(x-frac{7pi}{2}right)1+2sin x
6) sin^22x-cos^28xsinleft(frac{17pi}{2}+10xright)
7) 8cos xfrac{sqrt{3}}{sin x}+frac{1}{cos x}
Đọc tiếp
1) \(\frac{1}{\cos x}+\frac{1}{\sin2x}=\frac{2}{\sin4x}\)
2) \(\cos3x\cdot\tan5x=\sin7x\)
3) \(\tan5x\cdot\tan2x=1\)
4) \(4\cos x-2\cos2x-\cos4x=1\)
5) \(\sin\left(2x+\frac{5\pi}{2}\right)-2\cos\left(x-\frac{7\pi}{2}\right)=1+2\sin x\)
6) \(\sin^22x-\cos^28x=\sin\left(\frac{17\pi}{2}+10x\right)\)
7) \(8\cos x=\frac{\sqrt{3}}{\sin x}+\frac{1}{\cos x}\)