Given: 

Find: 

To find:
The value of
Given:
And,
The Figure (1) is given as,
Figure (1)
Approach:
The bisector of an angle is the ray that separates the given angle into two congruent angles.
Calculation:
Since,
Substitute
Multivariable Calculus
Precalculus: Mathematics for Calculus (Standalone Book)
Finite Mathematics
Understanding Basic Statistics
Essentials of Statistics for The Behavioral Sciences (MindTap Course List)
Calculus: Early Transcendentals
Applied Calculus for the Managerial, Life, and Social Sciences: A Brief Approach
Calculus: Early Transcendental Functions
Essentials Of Statistics
Elementary Technical Mathematics
Calculus: An Applied Approach (MindTap Course List)
Finite Mathematics and Applied Calculus (MindTap Course List)
Statistics for The Behavioral Sciences (MindTap Course List)
Intermediate Algebra
Applied Calculus
Single Variable Calculus: Early Transcendentals, Volume I
Mathematical Applications for the Management, Life, and Social Sciences
Mathematical Excursions (MindTap Course List)
Probability and Statistics for Engineering and the Sciences
Single Variable Calculus
Calculus (MindTap Course List)
Elements Of Modern Algebra
Calculus of a Single Variable
Contemporary Mathematics for Business & Consumers
Single Variable Calculus: Early Transcendentals
Trigonometry (MindTap Course List)
Calculus: Early Transcendental Functions (MindTap Course List)
Study Guide for Stewart's Single Variable Calculus: Early Transcendentals, 8th
Study Guide for Stewart's Multivariable Calculus, 8th
Finite Mathematics for the Managerial, Life, and Social Sciences
STATISTICS F/BUSINESS+ECONOMICSTEXT
Statistics for Business & Economics, Revised (MindTap Course List)
Multivariable Calculus
Mathematics For Machine Technology
Mathematics: A Practical Odyssey
Research Methods for the Behavioral Sciences (MindTap Course List)
Calculus (MindTap Course List)
Research Methods for the Behavioral Sciences (MindTap Course List)
Introduction To Statistics And Data Analysis
College Algebra (MindTap Course List)