Mathematics
Mathematics, 23.04.2020 03:27, emblemhacks

Assume that 0< x < pi/2 and 0< y < pi/2. find the exact value of cos(x+y) if cos x = 3/5 and cos y = 4/5.

a. 25/24

b. -25/24

c. 24/25

d. -24/25

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Assume that 0< x < pi/2 and 0< y < pi/2. find the exact value of cos(x+y) if cos x = 3/5...

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