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cos(195) = -0.965925826289

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14y ago

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Cos 195 degree use the trigonometry functions of quadrantal angles and special to find the exact value?

cos(195) = cos(180 + 15) = cos(180)*cos(15) - sin(180)*sin(15) = -1*cos(15) - 0*sim(15) = -cos(15) = -cos(60 - 45) = -[cos(60)*cos(45) + sin(60)*sin(45)] = -(1/2)*sqrt(2)/2 - sqrt(3)/2*sqrt(2)/2 = - 1/4*sqrt(2)*(1 + sqrt3) or -1/4*[sqrt(2) + sqrt(6)]


What is the exact value of COS 40.7 40.7?

The exact value of (\cos(40.7^\circ)) is not a simple rational number or a well-known trigonometric value. To find its numerical approximation, you can use a calculator, which gives (\cos(40.7^\circ) \approx 0.7578). For precise applications, it's best to use a calculator or software that can compute trigonometric functions.


What is the exact value of tan 195?

The exact value of (\tan 195^\circ) can be found using the tangent addition formula. Since (195^\circ) is in the third quadrant, where tangent is positive, we can express it as (\tan(180^\circ + 15^\circ)). This gives us (\tan 195^\circ = \tan 15^\circ), which is (\frac{\sin 15^\circ}{\cos 15^\circ}). Using the known values, (\tan 15^\circ = 2 - \sqrt{3}). Therefore, (\tan 195^\circ = 2 - \sqrt{3}).


What is the exact value of cos 120?

negative one half


What is the exact value of cos 15?

It is: cos(15) = (sq rt of 6+sq rt of 2)/4


What is the half angle formula to find the exact value for tan 165?

tan u/2 = sin u/1+cos u


What is the exact value of cos 30?

The radical answer is sqrt(3)/2. (0.86602540378443864676372317075294)


What is the value of Cos 1?

The inverse cos of 1 is equal to o degrees. You can find this answer by knowing what angle measurement has cos equal to a value of 1.


What is the exact value of cos 70 degrees?

The exact value is an irrational number, and can't be written on paper with digits.0.34202 is less than 0.000042 percent wrong.Cos(70 deg) is an irrational number and it is impossible to give its exact value.


What is the exact value of cos 7.5 pie divided by 6?

1.25


What does the cos of 195 degrees equal?

(-1-√3)/(2√2)


How do you get the value of cos pi?

To find the value of cos(π), you can refer to the unit circle. The angle π radians corresponds to 180 degrees, which is located on the negative x-axis. At this point, the coordinates are (-1, 0), so the value of cos(π) is -1.