How do you prove # (cosx - sinx)/(cos^3x - sin^3x) = 1/(tanxcos^2x + 1)#?
3 Answers
Verified below...
Explanation:
Given:
When working with the denominator:
Remember:
Remember
Proved below.
Please see the explanation.
Explanation:
lhs=
Now,
Let
Cancelling a-b
factor cos
Explanation:
[cancelling the
[using trignometric identities
multiplying and dividing by