Cos 60 Degrees Cos 30 Degrees + Sin 60 Degrees Sin 30 Degrees

Cos 60 degrees cos 30 degrees + sin 60 degrees sin 30 degrees

 

Answer:

√3/2

Step-by-step explanation:

cos 60=√3/2

cos 30=1/2

sin 60=1/2

sin 30=√3/2.

so, cos 60 cos 30 + sin 60 sin 30=(√3/2)(1/2)+(1/2)(√3/2)=√3/4+√3/4=

2√3/4=√3/2..


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