explain why  ( c o s ( 0 ) ) 2 + ( s i n ( 0 ) ) 2 = 1

Answer 1

Perhaps Melvin’s problem should have been typed as

cos(0)² + sin(0)² = 1

At least that is identically true for any angle, not just 0.

Answer 2

Melvin are you sure you wrote the problem down correctly??? Unless this is some type of tricky math riddle, I think this problem is incoherent.

cos0 = 1

sin0 = 0

Therefore 2 = 1, which is impossible or 1 = 1/2

2cos0 + 2sin0 = 1 =

2 + 0 = 1

2 ≠ 1

Or

2(cos0 + sin0) = 1

cos0 + sin0 = 1/2 =

1 + 0 = 1/2 =

1 ≠ 1/2