已知点\(P\left( \sin \dfrac{3 \pi }{4}, \cos \dfrac{3 \pi }{4}\right)\)落在角\( \theta \)的终边上,且\( \theta \in [0,2 \pi )\),则\( \theta \)的值为( ) A:\(\dfrac{ \pi }{4}\) B:\(\dfrac{3 \pi }{4}\) C:\(\dfrac{5 \pi }{4}\) D:...
f(x)在\left[ k \pi -\dfrac{ \pi }{12},k \pi +\dfrac{5 \pi }{12} \right]上单增,在\left[ k \pi +\dfrac{5 \pi }{12},k \pi +\dfrac{11 \pi }{12} \right]上单减,k\in \mathbf{Z}.(2)\dfrac{\sqrt{3}}{4}. (1)f(x)=\sin 2x-\sqrt{3}(1+\cos 2x)...
Answer to: Find the exact value of cos \left ( \dfrac{4\pi}{3} \right ). By signing up, you'll get thousands of step-by-step solutions to your...
\cos \left(\dfrac{\pi}{3}\right) and \sin \left(\dfrac{7\pi}{4}\right) Find the exact solution of 4 cos -1 x - 2 pi = 2 cos -1 x. If \tan \theta = \frac{4}{3}, \ 0 \leq \theta \leq \frac{\pi}{2} , then find the exact value of: a) \sin \theta , b)...
Consider the given function and the given interval. f(x) = 14 sin x - 7 sin 2 x, [0, pi] (a) Find the average value f_{ave} of f on the given interval. (b) Find c such that f_{ave} = f(c). (Round you Suppo...
(5)\(\sin \left(-\dfrac{4 \pi }{3}\right)\); (6)\(\tan556^{ \circ }\). 相关知识点: 试题来源: 解析 (1)正; (2)负; (3)零; (4)负; (5)正; (6)正. 说明 认识不同位置的角对应的三角函数值的符号.反馈 收藏 ...
若f(x)在[0,\pi ]上有且只有3个零点,则\begin{cases} \dfrac{7\pi }{3\omega }\leqslant \pi \\\dfrac{10\pi }{3\omega }>\pi \\\end{cases},得\frac{7}{3}\leqslant \omega < \frac{10}{3},故答案为:\left[ \frac{7}{3},\frac{10}{3} \right)....
Answer to: What is y\left(\dfrac{\pi}{2}\right) \text{ if }y' = 4 \cos t \text{ and } y(0) = 0? By signing up, you'll get thousands of...
Click here:point_up_2:to get an answer to your question :writing_hand:given the function fleftxright such that 2 fleftxrightx fleftdfrac 1 x right2
Answer to: Find the length of the curve. r = \cos^2\left(\dfrac{x}{2}\right) \text{ on } 0 \leq x \leq \dfrac{\pi}{3} By signing up, you'll get...