Question

The value of (cos 60°.cos 30º- sin 60°.sin30")
is
AO
B. 1
C. 1/2
D. 73/2​

Answer 1

Answer:

Option A i.e.0 is the answer

Step-by-step explanation:

Given that:-

cos 60°.cos 30º- sin 60°.sin30°

This is in the form of CosA Cos B - SinA SinB

Here,A=60° and B=30°

We know that

CosA Cos B - SinA SinB=Cos(A+B)

cos 60°.cos 30º- sin 60°.sin30°=

Cos(60°+30°)

cos 60°.cos 30º-sin60°.sin30°=

=Cos90°=0

cos 60°.cos 30º- sin 60°.sin30°=0

Answer 2

Answer:

0 is the answer for your question