Answer:
see below
Step-by-step explanation:
The sine of an angle is the same as the sine of its supplement. You know π radians is 180°, so the supplement of an angle in radians is that angle subtracted from π.
sin(π(a/11)) = sin(π(11-a)/11)
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For example,
sin(π/11) = sin(π(11-1)/11) = sin(10π/11)
