Trigonometry Find the Exact Value cos (240) cos (240) cos ( 240) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because cosine is negative in the third quadrant. −cos(60) - cos ( 60) The exact value of cos(60) cos ( 60) is 1 2 1 2. −1 2 - 1 2 Explanation: For cos 240 degrees, the angle 240° lies between 180° and 270° (Third Quadrant ). Since cosine function is negative in the third quadrant, thus cos 240° value = - (1/2) or -0.5 Since the cosine function is a periodic function, we can represent cos 240° as, cos 240 degrees = cos (240° + n × 360°), n ∈ Z.
cos 240 cos(240) cos240 First Method YouTube
Explanation: The reference angle for #240^@# is #60^@# (since #240^@ = 180^@ + 60^@#) #60^@# is an angle of one of the standard triangles with #cos (60^@) = 1/2# #240^@# is in the 3rd quadrant so (either by CAST or noting that the "x-side" of the associate triangle is negative) #cos (240^@) = -cos (60^@)# #cos (240^@) = -1/2# Answer link Arithmetic Matrix Simultaneous equation Differentiation Integration Limits Solve your math problems using our free math solver with step-by-step solutions. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more. cos(240) Natural Language; Math Input; Extended Keyboard Examples Upload Random. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music… Solution Compute the value of the given expression: Given: cos ( 240 °) = cos ( 270 ° - 30 °) using identity cos ( 270 ° - A) = - sin ( A) cos ( 270 ° - 30 °) = - sin ( 30 °) ⇒ cos ( 240 °) = - 1 2 Therefore, the value of the given expression is - 1 2. Hence, the exact value for cos ( 240 °) is - 1 2. Suggest Corrections 17 Related Videos
Soal Nilai dari cos 240^() adalah....
Trigonometry is a branch of mathematics concerned with relationships between angles and ratios of lengths. The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies. This calculator has 1 input. What 8 formulas are used for the Trig Measurement Calculator? sin (θ) = Opposite/Hypotenuse cos (θ) = Adjacent/Hypotenuse tan (θ) = Opposite/Adjacent csc (θ) = 1/sin (θ) sec (θ) = 1/cos (θ) cot (θ) = 1/tan (θ) Coterminal Angles are found by θ ± 360° Free Pre-Algebra, Algebra, Trigonometry, Calculus, Geometry, Statistics and Chemistry calculators step-by-step The Cosine function ( cos (x) ) The cosine is a trigonometric function of an angle, usually defined for acute angles within a right-angled triangle as the ratio of the length of the adjacent side to the hypotenuse. It is the complement to the sine. In the illustration below, cos (α) = b/c and cos (β) = a/c.
Nilai Dari Cos 240 Adalah
Use this simple cos calculator to calculate the cos value for 240° in radians / degrees. The Trignometric Table of sin, cos, tan, cosec, sec, cot is useful to learn the common angles of trigonometrical ratios from 0° to 360°. Select degrees or radians in the drop down box and calculate the exact cos 240° value easily. α cos (α) In this video, we learn to find the value of cos(-240). Here I have applied cos(-x) = cos(x) identity to find the value of cos -240. The URL of the video exp.
Trig calculator finding sin, cos, tan, cot, sec, csc. To find the trigonometric functions of an angle, enter the chosen angle in degrees or radians. Underneath the calculator, the six most popular trig functions will appear - three basic ones: sine, cosine, and tangent, and their reciprocals: cosecant, secant, and cotangent. Trigonometry Find the Value Using the Unit Circle cos (240 degrees ) cos (240°) cos ( 240 °) Find the value using the definition of cosine. cos(240°) = adjacent hypotenuse cos ( 240 °) = adjacent hypotenuse Substitute the values into the definition. cos(240°) = −1 2 1 cos ( 240 °) = - 1 2 1 Divide −1 2 - 1 2 by 1 1. −1 2 - 1 2
Como calcular seno e cosseno de 240?
To obtain 240 degrees in radian multiply 240° by π / 180° = 4/3 π. Cos 240degrees = cos (4/3 × π). Our results of cos240° have been rounded to five decimal places. If you want cosine 240° with higher accuracy, then use the calculator below; our tool displays ten decimal places. Evaluate cos(240) Step 1. Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because cosine is negative in the third quadrant. Step 2. The exact value of is . Step 3. The result can be shown in multiple forms. Exact Form:
