Algebra 2 - Find the Double Angle of Tangent To a Triangle, Sin v = 4/5

The video tutorial explains how to find the tangent of 2V given the sine of V. It starts by identifying the quadrant for the angle and drawing a right triangle. Using Pythagorean triples, the adjacent side is calculated, allowing the tangent of V to be determined. The tutorial then simplifies the tangent of 2V using trigonometric formulas, concluding with the final answer.

How can you find the adjacent side using the Pythagorean theorem?

What is the final answer for the tangent calculation as derived in the text?