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Elenna [48]
3 years ago
8

Trigonometry

Mathematics
1 answer:
FrozenT [24]3 years ago
8 0

Answer:

cos(25)

Step-by-step explanation:

cosAcosB + sinAsinB = cos(A-B)

cos(20)cos(45) + sin(20)sin(45)

= cos(20-45) = cos(-25)

= cos(25) or 0.906

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