urgent please without using table show that cos 35 degree cos 55 degree minus sin 35 degrees and 55 degree is equals to zero
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easy very easy try it out
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Step-by-step explanation:
LHS: =cos35.cos55 - sin35.sin55
=cos(90-55).cos(90-35) - sin.35.sin55
=sin35.sin55 - sin35.sin55
= 0
since, cos(90-x) = sinx
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