- #1

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## Homework Statement

Find the exact value of the expression:

## Homework Equations

sin[2arcsin(3/5)]

## The Attempt at a Solution

I know you're supposed to use sin2x=2sinxcosx somehow but not sure how to start.

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- #1

- 11

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Find the exact value of the expression:

sin[2arcsin(3/5)]

I know you're supposed to use sin2x=2sinxcosx somehow but not sure how to start.

- #2

Mark44

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## Homework Statement

Find the exact value of the expression:

## Homework Equations

sin[2arcsin(3/5)]

## The Attempt at a Solution

I know you're supposed to use sin2x=2sinxcosx somehow but not sure how to start.

Start by letting u = arcsin(3/5). Then your expression is sin(2u) = ?

It will be helpful to draw a right triangle where u is one of the acute angles. Label the sides and hypotenuse so that sin(u) = 3/5.

- #3

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Ah, OK! 24/25 correct?

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