Question

cos 64 degree into cos 26 degree minus sin 64 degree into sin 26 degree

Answer 1

zero is the answer...

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 2

Answer:

maibagiqniqk!aonwh wiomaubao,..,.......

Step-by-step explanation:

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