邻边=1+(-1)3 对-1进行3次方运算。 邻边=1-1 从1中减去1。 邻边=0 将0重写为02。 邻边=02 邻边=0 邻边=0=0 求余弦值。 点击获取更多步骤... 使用余弦的定义求cos(3theta)的值。 cos(3theta)=adjhyp cos(3theta)=01 用0除以1。
参数方程:\displaystyle\left\{ \begin{array}{lc} x=a(1+cos\theta)cos\theta\\ y=a(1+cos\theta)sin\theta\\ \end{array} \right.(a>0,\theta\in[0,2\pi]) 1.⑶图像 图3 ρ=a(1-sinθ) 1.⑶表达式 极坐标:\displaystyle \rho=a(1-sin\theta), \theta\in[0,2\pi],a>0 直角坐标...
】解:由 【解析】解:由 【解析】解:由 【解析】解:由 【解析】解:由 \$\rho = \sin \theta - 3 \cos \theta - 1\$ 【解析】解:由 【解析】解:由 \$\rho = \sin \theta - 3 \cos \theta - 1\$ 【解析】解:由 【解析】解:由 \$\rho = \sin \theta - 3 \cos \theta ...
解析 \(-3\) 记\(t= \tan \dfrac{ \theta }{2}\),则由\(3 \sin \theta = \cos \theta -1\)得\(\dfrac{3\times 2t}{1+t^{2}}=\dfrac{1-t^{2}}{1+t^{2}}-1\),即\(2t^{2}+3t=0\),所以\(\tan\dfrac{ \theta }{2}=0\)或\(\tan \dfrac{ \theta }{2}=...
若\sin 2\theta -1+ (\sqrt{2}+ 1)i是纯虚数,则\theta 的值为( )A.2k\pi -\dfrac{\pi }{4}(k\in Z)B
首先,我们可以将 $3 \sin\theta = -\cos\theta$ 两边都除以 $\cos\theta$:$$3\frac{\sin\theta}{\cos\theta}=-1$$由于 $\tan\theta = \frac{\sin\theta}{\cos\theta}$,则上式可化为$$3\tan\theta=-1$$将等式两边同时除以 3:$$\tan\theta=-\frac13$$因此,当 $3 \sin...
sin3θ=sin(2θ+θ)=sin2θcosθ+cos2θsinθ =2sinθcosθcosθ+[1-2(sinθ)^2]sinθ =2sinθ[1-(sinθ)^2]+[1-2(sinθ)^2]sinθ =2sinθ-2(sinθ)^3+sinθ-2(sinθ)^3 =3sinθ-4(sinθ)^3
যদি sintheta+ sin^2theta+sin^3theta=1 হয় তবে প্রমাণ করো যে,cos^6theta-4cos^4theta+8cos^2theta=4
The given relation is satisfied only when sintheta1=sintheta2=sintheta3=1 rArrcostheta1=costheta2=costheta3=0 rArrcostheta1+costheta2+costheta3=0
Solve the equation on the interval (0,2 pi) . sin(2 theta) = -dfrac{sqrt{3{2} Find all solutions of the equation in the interval [0, 2pi). 2sin 2x - sqrt(2) = 0. Solve the equation on the interval [0, 2 pi). (cot theta - 1) (2 sin theta + 1) =...