Given that sinα=35 and cosα =-45 find: (1)sin2α (2)cos2α 相关知识点: 试题来源: 解析 (1)sin2α =2sinα cosα =2(35 )( -45)=-(24)(25) (2)cos2α =cos^2α -sin^2α =(-45 )^2-(35 )^2=7(25) 反馈 收藏 ...
百度试题 结果1 题目Given that sin x= 45 and that 90^(° )≤ x≤ 180^(° ), find the exact values of: cos x 相关知识点: 试题来源: 解析 - 35 反馈 收藏
If cos(θ) = 2/9 and θ is in the first quadrant, find sin(θ). If \sin(\theta)= -3/4 and the terminal side of angle (\theta) lies in quadrant 3, find \cos(\theta). Find \sin(\theta) given that \cos (\theta) = -\frac{4}{5} in qua...
Answer to: Given that sin(\theta) = frac \{1}{5} and \frac {\pi}{2} < \theta< \pi, find cos(\theta). By signing up, you'll get thousands of...
1.Understand the given information: We know thattanA=oppositeadjacent=43. This means in a right triangle, the opposite side (perpendicular) is 4 and the adjacent side (base) is 3. 2.Find the hypotenuse: Using the Pythagorean theorem: ...
百度试题 结果1 题目20.Given that cosθ=k/2 and 0°θ180° , find2a) tan^2θb) cotθ 相关知识点: 试题来源: 解析 1 2h√(1-h^2) 2 sin 40°cos 40° or sin 2(40°) 反馈 收藏
3 (i) Given that sin(0+45° ) + 2 cos(θ+60°)=3cos(0.25t) 0, find the exact value of tan 0 in a form involving surds. You need not simplify your answer.[4] 相关知识点: 试题来源: 解析 Use trig formulae and obtain an equation in sin 8 and cos 8 Obtain a corre...
Find dy/dx given y = ln((2x)/(1 + x)). Find dy/dx and d^2y/dx^2. (a) x = t + sin t, y = t - cos t. (b) x = 1 + t^2, y = t - t^3 Given that y = e^{-5 x} ln (x^3 +7), find {dy} / {dx}. ...
Given that f(0) = sin (\theta) and g(0) = cos (\theta), find the exact value of the expression below if \theta = 120: g \left ( \dfrac{0}{2} \right ). Given f''(x)=-36 sin (6x) and f'(0) and f(0)=2 . Find ...
单项选择题Given that sin A=5/13 and 0°≤A< 360°, what are all possible values of cos A ? A.-5/13 B.-5/13 C.12/13 D.-12/13 E.-12/13 点击查看答案 广告位招租 联系QQ:5245112(WX同号) 您可能感兴趣的试卷