Use Pythagorean / Trigonometric Identity for an angle in the Quadrant II

How to use Pythagorean Identity / Trigonometric Identity to solve problem involving an angle in the Quadrant II of a Unit Circle. RELATED LESSONS: (1). Use the Pythagorean Identity to determine signs of the Trig Functions.    • Use the Pythagorean Identity to determine ...   (2). Using the Trigonometric Identities to determine Angles in the Quadrant III.    • Using the Trigonometric Identities to dete...   (3). Concept of Using the Pythagorean Identity (SinA)^2 + (CosA)^2 = 1    • Concept of Using the Pythagorean Identity ...   (4). Use Pythagorean / Trigonometric Identity for an angle in the Quadrant II    • Use Pythagorean / Trigonometric Identity f...