Question

Write in terms of sine and cosine and simplify the expression.

sin^4 (A) − cos^4 (A) divide by
cos A − sin A

what does it mean write in terms of sine and cosine?

Answer 1

Write it in terms of SIN and COS

Answer 2

thank you.

Answer 3

For Numerator

(sin^2)^2 - (cos^2)^2
(sin^2 - cos^2)(sin^2 + cos^2)
(sin - cos) (sin + cos) (1)

At this pt Denominator = - (sin - cos)


Total Eq. is -(sin + cos)