Olivia P.
asked 05/08/20
verify the formula
Mark M.
answered 05/08/20
Mathematics Teacher - NCLB Highly Qualified
sin4 x - cos4 x
(sin2 x + cos2 x)(sin2 - cos2 x)
1 (sin2 x - cos2 x)
sin2 x - (1 - sin2 x)
sin2 x - 1 + sin2 x
2 sin2 x - 1
QED
Still looking for help? Get the right answer, fast.
OR
Find an Online Tutor Now
Choose an expert and meet online.
No packages or subscriptions, pay only for the time you need.