Question

Cos 60°+cos 30°= памагите пажалуста​

Answer 1

Ответ:

решение на фотографии

Answer 2

Absolutely, I'd be happy to help! Let's solve this trigonometric expression step by step:

$\cos 60^\circ + \cos 30^\circ$

We can use the fact that $\cos(90^\circ - \theta) = \sin \theta$.

1. First, let's rewrite $\cos 60^\circ$ using this property: $\cos 60^\circ = \sin(90^\circ - 60^\circ) = \sin 30^\circ$

2. Now, substitute this back into the original expression: $\sin 30^\circ + \cos 30^\circ$

3. Since $\sin 30^\circ = \frac{1}{2}$, we can simplify further: $\frac{1}{2} + \cos 30^\circ$

4. Finally, $\cos 30^\circ = \frac{\sqrt{3}}{2}$: $\frac{1}{2} + \frac{\sqrt{3}}{2}$

So, $\cos 60^\circ + \cos 30^\circ = \frac{1}{2} + \frac{\sqrt{3}}{2}$.

If you need further clarification, feel free to ask!