Mathematics, 17.12.2020 18:30 DeathFightervx
Sin a = 21/29, a lies in quadrant I and cos b = 5/13, b lies in quadrant I. Find cos(a+b).
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Sin a = 21/29, a lies in quadrant I and cos b = 5/13, b lies in quadrant I. Find cos(a+b)....
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