Algebra 2 Date: Section: Unit 6 Lesson 3 Notes Objective: SWBAT find the missing angles of right triangles using multiple methods including inverse trig functions. Cent of pritwollot erinswann Standards: HSG-SRT.C.8 Recall: Trig Ratio Definitions: sine = COSO = tane = Since sine, cosine, and tangent are FUNCTIONS, they can be used to find missing of right triangles. These functions also have inverses which undo or cancel out the original function/operation. The inverse of sine is or The inverse of cosine is or The inverse of tangent is or Inverse trig functions are used to find missing of right triangles. Recall: Use pythagorean theorem when there are two sides given in a right triangle and trying to find a missing side. Use trig functions and ratios when there is one acute angle and one side given in a right triangle and trying to find the missing side. Use inverse trig functions when given two sides and trying to find the angle measures. Finding Missing Angle Measures in Right Triangles 1. Find the measures of LD and LF. Round your answers to the nearest tenth. D- E 10 16 mLD = mZF =