Question

Solve for side AB. Show all your work
Please help!

Answer 1

Given triangle is a right angle triangle so we are allowed to use trigonometric formulas.

We want to find Hypotenuse using angle A and base 7 cm

so right choice is to use cosine

`\cos(A)=(AC)/(AB)`

`\cos(25^(\circ))=(7)/(AB)`

`0.90631=(7)/(AB)`

`AB=(7)/(0.90631)`

`AB=7.72362657369`

Hence value of side AB is approx 7.72 cm.