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Wewaii [24]
3 years ago
7

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

Mathematics
1 answer:
Reptile [31]3 years ago
5 0

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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