Question
(secA+tanA)(1-sinA)
Answers
Steve
just expand and see what happens
I'll elide the x's just for ease of typing
sec - sec*sin + tan - tan*sin
sec - tan + tan - tan*sin
sec - sin^2 * sec
sec(1-sin^2)
sec*cos^2
cos
I'll elide the x's just for ease of typing
sec - sec*sin + tan - tan*sin
sec - tan + tan - tan*sin
sec - sin^2 * sec
sec(1-sin^2)
sec*cos^2
cos