Math/calculus
Prove
Sin 8theta sin 10theta= cot 9theta (cos 10theta  cos 8 theta)
asked by
Jessica

use your suntoproduct formulas, and this drops right out.
posted by Steve

Sin 8theta sin 10theta= cot 9theta (cos 10theta  cos 8 theta)
I'm unable to solve itposted by Jes
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Sin 8theta sin 10theta= cot 9theta (cos 10theta  cos 8 theta) 
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