Q.1. How do you find cos 120 without a calculator?Ans. You can use both the following formulasi) cos (180° –θ) = – cosθ orii) cos (90° + θ) = – sinθQ.2. What is cos 120 in radians?Ans. In radian, the value of cos 120 is 2π/3 i.e equal to -1/2....
百度试题 结果1 题目Without using your calculator, find the exact value of: 相关知识点: 试题来源: 解析反馈 收藏
If \cos y = x \cos (a + y) and \frac{dx}{dy} = \frac{k}{1 + x^2 - 2x \cos a}, then find value of k. Find dw} \over {dx, where w = \cos z - \cos 3x\cos 5y + \sin 3x\sin 5y and z = 3x + 5y. Use this equation to find dy/dx.9y cos x = x...
Without the use of a calculator, find the exact value of sin(π12). Radians to Degrees: To measure the angles between any two lines, degrees and radians are used to represent the measure of the angle. A radian angle can be converted to a degree angle using the following ...
Question: Findfgiven thatf‴(x)=cosx,f(0)=4,f′(0)=6,f″(0)=9 Differentiation in calculus: To solve this problem, we'll integrate the given function since integration is a process of finding a function when it's derivative is given, which is also called anti-d...
How do you find sin 75 without a calculator? sin(A + B) = sin A cos B + cos A sin B, we can find the sine of(45° + 30°)to give sine of 75 degrees. Secant (sec), cosecant (csc) and cotangent (cot) example | Trigonometry | Khan Academy ...
Sine, cosine and tangent, often shortened to sin, cos, and tan in mathematical operations and on calculator keys, are the most basic trigonometric functions. All three are based on the properties of a triangle with a 90-degree angle, also known as a right triangle. By knowing the sides of...
(25)/7. Rearranging this equation results in sin(A) = sin(25)*12/7. Using a scientific calculator to find sin(25), carrying out the rest of the equation would show that sin(A) = 0.724. To find angle “A,” use the calculator to determine the inverse sine of 0.724. The answer ...
2 (a) It is given that t a n(A+B)=8andtan B =2. Without using a calculator,find the exact value of cot A .[3] (b) (i) Prove that sin 2.x(cot x-tan x)=2 cos 2.x.[3] (ii) Hence solve the equation sin 2.x(cot x-tan x)=sec 2x for 0≤xn.[4] ...
Without using a calculator find the exact values of arctan sqrt 3, arccos (sqrt 3)/2, and sin^-1 (sqrt 2)/ 2. How is a rectangle a convex quadrilateral? Solve for x given \tan x= -1 Simplify the expressions by using a Double-Angle Formula or a Half-Angle Formula. a) \cos^2...