Question

cos 30º. cos 60° - sin 30°. sin 60° = 0​

Answer 1

Step-by-step explanation:

√3/2*1/2-1/2*√3/2

√3/4-√3/4

=0

Answer 2

Answer:

prove is given below 0

Step-by-step explanation:

cos 30º. cos 60° - sin 30°. sin 60°

=

$= \frac{ \sqrt{3} }{2} . \frac{1}{2} - \frac{1}{2} \frac{ \sqrt{3} }{2} \\ = \frac{ \sqrt{3} }{4} - \frac{ \sqrt{3} }{4} \\ = 0$