cos 64 degree into cos 26 degree minus sin 64 degree into sin 26 degree
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cos 64 degree into cos 26 degree minus sin 64 degree into sin 26 degree
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cos 64×cos 26- sin 64×sin 26
since cos(90-A)= Sin A
therefore, we can write
cos 64= Sin(90-64)
ie
Cos 64= Sin 26
similarly,
Sin 64= Cos 26
putting the value,
sin 26× Cos 26- Cos26×Sin 26
=0
Answer:
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Step-by-step explanation:
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