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09-08-2020
Mathematics

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HELP :Write the expression as the
sine or cosine of an angle.

HELP Write the expression as the sine or cosine of an angle class=

Respuesta :

09-08-2020

Answer:

sin(4π/21)

Step-by-step explanation:

Step 1: Rearrange expression

sin(π/3)cos(π/7) - cos(π/3)sin(π/7)

Step 2: Use sin(A ± B)

sin(π/3 - π/7)

Step 3: Evaluate

sin(4π/21)

And we have our answer!

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