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The magnitude of cos(135°) is the same as that of cos(45°) [cos(180° - 135°)], and the sign is negative because it is in the second quadrant of the Cartesian plane, so it's the reciprocal of the negative square root of two, about -0.707.
The cosines of 2nd- and 3rd-quadrant angles are negative, and the sines of 3rd- and 4th-quadrant angles are negative.
What else can I help you with?
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 absolute value of 135?
Absolute value of -135 is 135.
What is the cosine of 135 degrees?
-0.7071067812, roughly.
How do you find the exact value of cos 5pi over 6?
To find the exact value of (\cos\left(\frac{5\pi}{6}\right)), first note that (\frac{5\pi}{6}) is located in the second quadrant, where cosine values are negative. The reference angle is (\pi - \frac{5\pi}{6} = \frac{\pi}{6}). The cosine of (\frac{\pi}{6}) is (\frac{\sqrt{3}}{2}), so (\cos\left(\frac{5\pi}{6}\right) = -\frac{\sqrt{3}}{2}). Thus, the exact value is (-\frac{\sqrt{3}}{2}).
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.
Find the exact value of cos 195?
cos(195) = -0.965925826289
What is the exact value of tan 135?
tan(135 degrees) = negative 1.
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 exact value of sin 255?
To find the exact value of sin 255°, we can use the sine subtraction formula. Since 255° = 270° - 15°, we can express it as: [ \sin(255°) = \sin(270° - 15°) = \sin(270°) \cos(15°) - \cos(270°) \sin(15°. ] Knowing that (\sin(270°) = -1) and (\cos(270°) = 0), we have: [ \sin(255°) = -1 \cdot \cos(15°). ] Thus, the exact value of (\sin(255°) = -\cos(15°)).
What is the exact value of cos 30?
The radical answer is sqrt(3)/2. (0.86602540378443864676372317075294)
What is cos 495 degree's?
cos(495) = cos(495-360) = cos(135) = -cos(180-135) = -cos(45) = -sqrt(1/2) or -1/sqrt(2)
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 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 is the absolute value of 135?
Absolute value of -135 is 135.
What is the cosine of 135 degrees?
-0.7071067812, roughly.
