Question

1) 2 cos0° +5 sin 90°-tg180°;

Answer 1

Ответ:

1) 2cos0° +5 sin 90°-tg180°

косинус 0° равен 1

синус 90° равен 1

тангенс 180° равен 0

Значит:

2*1+5*1-0

2+5

7

Ответ: 7

Answer 2

Let's break down the expression step by step:

1. $2 \cos(0^\circ)$: The cosine of 0 degrees is 1, so this term simplifies to $2 \cdot 1 = 2$.

2. $5 \sin(90^\circ)$: The sine of 90 degrees is 1, so this term simplifies to $5 \cdot 1 = 5$.

3. $\tan(180^\circ)$: The tangent of 180 degrees is 0, so this term simplifies to $0$.

Now, let's put it all together:

$2 \cos(0^\circ) + 5 \sin(90^\circ) - \tan(180^\circ) = 2 + 5 - 0 = 7$.

So, the final value of the expression is 7.