The cosine of 70 degrees is 0.34202014332567.
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cos(25o) = 0.906307787 ==========
cos 34o ≈ 0.829 cos 34 = 0.86074
cos 315 degrees is 4th quadrant same as cos (-45) degrees which is +0.7071
cos67,5
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.