Tomas C.

asked • 10/24/21

Use of trig formulas

a) 1+cos(8a)=?, given that 1+cos(2a)=2cos2(a)

b) sin2(4a)=?, given that sin(2a)=2sin(a)*cos(a)

2 Answers By Expert Tutors


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.


Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.