Question

sin(2arccos(3/5))

Answer 1

let arc cos(3/5) = angle so cos (angle) = 3/5

So draw right angle triangle & find value of sin(angle)

then we have sin(2(angle)) we know that formula = 2 sin(angle)* cos(angle)

so just plug values of sin(angle ) & cos(angle) & find value of sin(2angle)

Answer 2

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