Simplifying trigonometric expressions| Reduction formula| Co-functions| Grade 12 Maths exam
Автор: WONDER DAARA MATHEMATICS ONLINE
Загружено: 2025-07-30
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#reductionformula #trigonometry #firstquadrant #secondquadrant #thirdquadrant #fourthquadrant #castdiagram
The derivation of the reduction formulae was discussed in the previous video with a link • Reduction formulae fully explained with th... . Such formulae are
sin(180-A)=sinA
cos(180-A)=-cosA
tan(180-A)=-tanA
cos(360-A)=cosA
sin(360-A)=-sinA
tan(360-A)=-tanA
Negative angles were also discussed and these were
cos(-A)=cosA
sin(-A)=-sinA
tan(-A)=-tanA
sin(A-180)=-sinA
cos(A-180)= -cosA
The above-mentioned reduction formulae will be used to simplify the trigonometric expression in question.
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