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IrinaVladis [17]
3 years ago
15

Find the exact values of cos 3 pi/4 radians sin 3 pi/4 radians HELP!

Mathematics
1 answer:
bixtya [17]3 years ago
8 0
In degrees: 3π/4 radians = 135°
Angle of x=135° is in the 2nd Quadrant and has negative cos x values and positive sin x values.
cos 135° = cos ( 90° + 45°)= - sin 45° =- \frac{ \sqrt{2} }{2}
sin 135° = sin ( 90° + 45° ) = cos 45° =\frac{ \sqrt{2} }{2}. You can also see the graph in the attachment. 
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