To find the length of AB, we can use the cosine formula in a right-angled triangle.
Given: Cos A = 0.75
Cos A = Adjacent Side / Hypotenuse0.75 = AB / √7AB = 0.75 √7AB = √73/4AB = 3√7 / 4
Therefore, the length of AB is 3√7 / 4.
To find the length of AB, we can use the cosine formula in a right-angled triangle.
Given: Cos A = 0.75
Cos A = Adjacent Side / Hypotenuse
0.75 = AB / √7
AB = 0.75 √7
AB = √73/4
AB = 3√7 / 4
Therefore, the length of AB is 3√7 / 4.