Factor by Grouping sin(pi/2)cos(pi/7)+cos(pi/2)sin(pi/7)

Factor by Grouping sin(pi/2)cos(pi/7)+cos(pi/2)sin(pi/7)
The polynomial cannot be factored using the grouping method. Try a different method, or if you aren't sure, choose Factor.
The polynomial cannot be factored using the grouping method.
The exact value of is .
Multiply by .
Evaluate .
The exact value of is .
Evaluate .
Multiply by .
Add and .
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