Labels:text | line | diagram | screenshot | parallel | rectangle | plot OCR: Pythagorean identity sin2x + cos x = 1 C 0 secex = 1 + tan x cscªx = 1 + cot2x Y a Law of sines Law of cosines sin x sin B sin Y a2= b2 + c2- 2bc cos x = a b = table of contents
