cos 120 value We can show that 120 degrees can be represented in two angles whose value can be taken from trigonometry table 90 degree and 180 degree 180 60 120 1 90 30 120 2 Let s use these now Cos 120 cos 180 60 cos 60 since cos 180 x cos x
The cos of 120 degrees is 0 5 the same as cos of 120 degrees in radians To obtain 120 degrees in radian multiply 120 by 180 2 3 Cos 120degrees cos 2 3 Our results of cos120 have been rounded to five decimal places Simply type the angle in degrees or radians and you ll find the cosine value instantly Read on to understand what is a cosine and to find the cosine definition as well as a neat table with cosine values for basic angles such as cos 0 cos 30 or
cos 120 value
cos 120 value
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Find The Exact Value Of The Following Sin 210 Degrees Homework Study
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The value of cos 120 is minus half which can be written as 1 2 or 0 5 there are two ways through which the value of cos 120 can be calculated they are as follows Case 1 Let us express 120 as 180 60 cos 120 cos 180 60 Since cos 180 x cos x Therefore cos 180 60 cos 60 cos 120 You can use a reduction formula See explanation Explanation displaystyle cos 120 cos left 180 60 right cos 60 frac 1 2
Cos 120 cos 120 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 second quadrant cos 60 cos 60 The exact value of cos 60 cos 60 is 1 2 1 2 1 2 1 2 The result can be shown in multiple forms Exact Form 1 2 1 2 Use this simple cos calculator to calculate the cos value for 120 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 120 value easily cos
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Calculator Chart Examples Find the cosine of 120 degrees Cos 120 cos 120 1 2 exactly Sin Tan Deg to Rad Rad to Deg Use our cos x calculator to find the cosine of 120 degrees cos 120 or the cosine of any angle in degrees and in radians Trigonometric Functions Chart of Special Angles means an undefined value Answer The value of cos 120 degrees is 1 2 Let us find the value of cos 120 with the help of the trigonometry formulas Explanation Let us write 120 as a sum of 90 and 30 Now we can apply the cos a b formula cos a b cos a cos b sin a sin b On substituting a as 90 and b as 30 we get
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