How could I prove that this is true?
2 Answers
See below.
Explanation:
Subtract the terms in the numerator, taking
Rewrite the denominator in terms of sine and cosine. Cancel out the relevant terms.
Factor the numerator; cancel out the sine.
Recalling that
So,
Refer to the explanation.
Explanation:
Start from
Since,
Multiply both
Since
This is our
Hope this helps :)