Question

15.8. 1) arctg1; 2) arctg0; 3) arctg(−1); 4) arctg-3/3​

Answer 1

1)a=45
2)a=90
3)a=270
4)a=135

Answer 2

It seems like you want to find the arctangent (often denoted as "arctan" or "atan") of various values. I'll calculate each of these for you:

1. arctan(1) arctan(1) is equal to approximately 45 degrees or π/4 radians.

2. arctan(0) arctan(0) is equal to 0 degrees or 0 radians.

3. arctan(-1) arctan(-1) is equal to approximately -45 degrees or -π/4 radians.

4. arctan(-3/3) arctan(-3/3) can be simplified to arctan(-1), which is approximately -45 degrees or -π/4 radians.

So, the values are as follows:

1. arctan(1) ≈ 45 degrees or π/4 radians
2. arctan(0) = 0 degrees or 0 radians
3. arctan(-1) ≈ -45 degrees or -π/4 radians
4. arctan(-3/3) ≈ -45 degrees or -π/4 radians