Solve Trigonometric Equation cos(2x) - 2/sec (x) = 2 - Grade 12

A trigonometric equation involving multiple angles and a reciprocal trigonometric function is solved showing all steps with details. Trigonometric identities are used to rewrite cos(2x) = 2 cos^2(x) - 1 and 2/sec (x) = 2 cos (x) . The substitution u = cos(x) is made which helps in writing the given equation as a quadratic equation which is solved for u and then u is solved for x. More from Grade 12 Math Practice at https://www.analyzemath.com/high_school_math/grade_12/grade-12-practice.html More grade 12 math practice at https://www.analyzemath.com/high_school_math/grade_12/grade-12-practice.html More math videos at https://www.analyzemath.com/math-videos.html. More math problems with solutions at https://www.analyzemath.com More grade 11 math practice at https://www.analyzemath.com/high_school_math/grade_11/grade-11-practice.html Subscribe to my channel to get more videos on math for all levels https://www.youtube.com/channel/UC2cmvDflm86w7C_D7QmcOVA? sub_confirmation=1