Mathematics
Mathematics, 28.06.2019 13:30, elizabethburkha

Given cos a= 3/5, sin b = 5/13 and a and b are first quadrant angles find cos(a + b) a. 1/3 b. 16/65 c. -33/65 explain

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Given cos a= 3/5, sin b = 5/13 and a and b are first quadrant angles find cos(a + b) a. 1/3 b. 16/65...

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