The question has been posted below:

Step-by-step explanation:

1 + tan²θ = sec²θ

so

1 + (15/8)² = (17/8)²

point A is positioned at 1.75

Step-by-step explanation:

Since there are only 3 ticks within each number line, you can conclude that each teach is 0.25. Since it is one down from 2, you can do 2 - 0.25 = 1.75.

Thus the answer for point A is 1.75.