Inactive Tutor answered • 01/05/14
Tutor
New to Wyzant
(sin9x+sin5x)/(cos9x-cos5x)
= (sin(7x+2x) + sin(7x-2x))/(cos(7x+2x)-cos(7x-2x))
= 2sin7x cos2x / (2sin7x sin 2x)
= cot2x
Serenity E.
asked • 01/05/14Verify: sin9x+sin5x/cos9x-cos5x=cot2x
This is for my trig class, thanks for the help!
Follow
•
2
Add comment
More
Report
1 Expert Answer
Still looking for help? Get the right answer, fast.
Ask a question for free
Get a free answer to a quick problem.
Most questions answered within 4 hours.
OR
Find an Online Tutor Now
Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.
