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What is the value of cos 45 degree?
Oh honey, cos 45 degrees is just 0.7071. It's like asking me what color the sky is - it's blue, duh. So, go ahead and plug that number into your trig functions and strut your stuff with that knowledge.
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)]
When does cos X equal sin X?
When the angle X = 45 or 225 degrees, or any other angle that falls at the same position as one of these angles in polar coordinates.
How many degrees is in an eighth of a turn?
45 degrees. 360 degrees divided by 8 is 45.
What is the supplement of 135 degrees?
The supplement of an angle is the angle that, when added to the original angle, equals 180 degrees. Therefore, to find the supplement of 135 degrees, we subtract 135 from 180. The supplement of 135 degrees is 45 degrees.
