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
Solution: Given tan a =-2 which is -ve, therefore, a lies in second or fourth quadrant. Also e^2a=1+tan^2a=1+(-2)^2=5 ⇒SeCO=±√5 . Two cases arise: Case I. When a lies in the second quadrant, sec a is (-ve). Therefore,seca=-√5 ⇒cosa=-1/√5 sina=(sina)/(...
tan(2x)= Double angle identity: Double angle identity for tan can be found by the formula; tan(A+B)=tanA+tanB1−tanAtanB We plug A=B and get; tan(2A)=2tanA1−tan2A Answer and Explanation:1 ...
Alternatively, you may wish to take your exam at home using our remote on-demand exams if this option is available in your country. Book a remote on-demand exam. Location/regionCentre nameAddressEmailTelephoneLicence Albania Abraham Lincoln Centre Rr. Qemal Stafa, Nr, 184, Ti...
tan2x if tanx=125 and x terminates in Quadrant I. Double-Angle FormulasThe double-angle formulas can actually be expressed in terms of the tangent function instead of the commonly used sine and cosine functions. The double-angle formula of the sine function in terms...
Answer to: Find \sin 2x, \cos 2x and\tan 2x from the given information a). \sec x = 2, x is in quadrant IV. b). \tan x = \frac{-4}{3}, x is in...
Sin cos tan values are the primary functions in trigonometry. Learn the values for all the angles, along with formulas and table. Also, learn to find the values for these trigonometric ratios.
Find sin 2x, cos 2x , and tan 2x if tan x = dfrac{3}{4} and x terminates in quadrant III . If sin A = 7/25 and A terminates in quadrant I, find cos A and tan A. Find \sin 2x, \cos 2x,\ and\ \tan 2x\ if\ \sin x= -\frac{2}{\sqrt{5and x termina...
【题目】When you are learning English, you find__wrong to translate a sentence word byword into your___language. T ake thesentence "How do you do?" as anIf you lookeach word in the, one at a time, what is you? It must be asentencein your native language. Languages do not only ...
If ST and SN are the lengths of the subtangent and the subnormal at the point θ = π/2 on the curve x = a(θ + sin θ), y = a(1 - cos θ), a ≠ 1, then. So,SN = ST. What is the formula for the radius of curvature?