Question

Evaluate the following: cos60° cos30⁰ - sin60⁰ sin 30°​

Answer 1

Answer:

0

Explanation:

cos60 cos30 - sin60 sin 30

$= \frac{1}{2} \times \frac{ \sqrt{3} }{2} - \frac{ \sqrt{3} }{2} \times \frac{1}{2}$

$= \frac{ \sqrt{3} }{4} - \frac{ \sqrt{3} }{4}$

$= 0$

Just substitute the values of the trigonometric angles and simplify it.

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