G-SRT.C. Define trigonometric ratios and solve problems involving right triangles
G-SRT.C.6. Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle, leading to definitions of trigonometric ratios for acute angles.
G-SRT.C.7. Explain and use the relationship between the sine and cosine of complementary angles.
G-SRT.C.8. Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.