Simplify (sinx - cosx) (sinx + cosx)

Question

Mila Baldwin

Mathematics

19 September, 15:30

Simplify (sinx - cosx) (sinx + cosx)

+1

Answers (1)

Know the Answer?

Callie Hoover · Answer 1

[sin (x) - cos (x) ][sin (x) + cos (x) ]

sin (x) [sin (x) + cos (x) ] - cos (x) [sin (x) + cos (x) ]

sin (x) [sin (x) ] + sin (x) [cos (x) ] - cos (x) [sin (x) ] - cos (x) [cos (x) ]

sin² (x) + sin (x) cos (x) - sin (x) cos (x) - cos² (x)

sin² (x) - cos² (x)

-cos (2x)