2sin^2(2x+pi/3)-6sin(x+pi/6)+cos(x+pi/6)+2=0
2sin^2(2x+pi/3)-6sin(x+pi/6)+cos(x+pi/6)+2=0
4( sin6x + cos6x) - cos(π/2 -2x)= 0 giúp e với ạ
1)Cos^2(x-pi/5)=sin^2(2x+4pi/5) 2)sin3x=căn2.cos(x-pi/5)+cos3x Giúp e các bước giải 2 pt này vs ạ
a) \(2sin\left(x+\dfrac{\pi}{3}\right)+1=0\)
b) \(1+2sin\left(x-30^o\right)=0\)
c) \(\sqrt{3}+2sin\left(x-\dfrac{\pi}{6}\right)=0\)
d) \(2sin\left(x+10^o\right)+\sqrt{3}=0\)
e) \(\sqrt{2}+2sin\left(x-15^o\right)=0\)
f) \(\sqrt{2}sin\left(x-\dfrac{\pi}{3}\right)+1=0\)
g) \(3+\sqrt{5}sin\left(x+\dfrac{\pi}{3}\right)=0\)
h) \(1+sin\left(x-30^o\right)=0\)
i) \(3+\sqrt{5}sin\left(x-\dfrac{\pi}{6}\right)=0\)
k) \(2\sqrt{2}sin^2x-sin2x=0\)
Sin3x= Căn2.cos(x-pi/5)+cos3x Giúp e giải phương trình này với ạ
Giải các pt sau
a, \(\dfrac{1}{sinx}+\dfrac{1}{cosx}=4sin\left(x+\dfrac{\pi}{4}\right)\)
b, \(2sin\left(2x-\dfrac{\pi}{6}\right)+4sinx+1=0\)
c, \(cos2x+\sqrt{3}sinx+\sqrt{3}sin2x-cosx=2\)
d, \(4sin^2\dfrac{x}{2}-\sqrt{3}cos2x=1+cos^2\left(x-\dfrac{3\pi}{4}\right)\)
\(\dfrac{3cos2x-2cos\left(\dfrac{201\pi}{2}-x\right)+5}{2-2sin^2x}=0\)
Giải giúp mình với ạ <333333
giải pt :
a, cos(2x+\(\frac{\pi}{3}\)) =\(\frac{-\sqrt{2}}{2}\)
b, 3cos2x +5sinx -5sinx -5 =0
c, cos4x -2sin2x -1 =0
d, sin5x -cos5x +1 = 0
e, 2cos2 - sinx - cos x -2sin2x - 1 = 0
f, cos ( 4x + \(\frac{\pi}{3}\)) = sin (x +\(\frac{\pi}{5}\))
giải giúp t vs t đag cần
thank you.
1)giải pt a)√2 cos2x-1=0
b) sinx =cos3x
c) cos (x+π/3) +sin(3x+π/4)=0
d)tan 2x = cot (x+π/4)
e) sin x = √3 cos x
f) tan^2(π/3-2x)-3=0
bài 1: a) \(sin\left(2x+\dfrac{\pi}{6}\right)+sin\left(x-\dfrac{\pi}{3}\right)=0\)
b) \(sin\left(2x-\dfrac{\pi}{3}\right)-cos\left(x+\dfrac{\pi}{3}\right)=0\)
c) \(sin\left(2x+\dfrac{\pi}{3}\right)+cos\left(x-\dfrac{\pi}{6}\right)=0\)