Question

If sin(x)=2/5 and x is an acute angle, find the exact value of tan(2x)

Answer 1

Answer:Step 1, find the cos(x)

Step 2, find the sin(2x) --- There's a formula for sin(2x) using sin(x) and cos(x).

If you don't know it, you can look it up.

I know it, there's no reason for me to look it up.

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Step 3, find the cos(2x)

Step 3, find the tan(2x)

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Angle 2x is in Q1

Step-by-step explanation: