3 years ago

Find the exact value of cos a, given that sin a= 8/11 and

Mathematics

1 answer:

DerKrebs [107]3 years ago

7 0

Answer:

cos(a) = (√57)/11

Step-by-step explanation:

cos(a) = √(1 -sin(a)²) = √(1 -(8/11)²) = √(57/121)

cos(a) = (√57)/11

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