Question

if sin a is equal to 3 by 4 calculate Cos A

Answer 1

Answer:

Sin^2 A+Cos^2 A = 1

Cos^2 A=1-Sin^2 A

Cos A = (1-3/4*3/4)^1/2

Cos A = (1-9/16)^1/2

Cos A= (7/16)^1/2

Cos A = (7)^1/2   / 4

Step-by-step explanation:

Answer 2

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