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DeepuChepurigp5919 ∙
cos 315 degrees is 4th quadrant same as cos (-45) degrees which is +0.7071
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=1/sqrt(2)
cos 34o ≈ 0.829 cos 34 = 0.86074
cos(25o) = 0.906307787 ==========
long number
cos67,5
It is: cos(15) = (sq rt of 6+sq rt of 2)/4