- #1
Craig is Lege
- 8
- 0
hello. i need help deriving trig formulas.
the first problem i most derive is
51. sin^2 x + cos^2 x = 1
i can use these identities:
a. sin(-x) = -sinx
b. cos(-x) = cos(x)
c. cos(x+y) = cosxcosy - sinxsiny
d. sin(x+y) = sinxcosy + cosxsiny
thanks for any help
the first problem i most derive is
51. sin^2 x + cos^2 x = 1
i can use these identities:
a. sin(-x) = -sinx
b. cos(-x) = cos(x)
c. cos(x+y) = cosxcosy - sinxsiny
d. sin(x+y) = sinxcosy + cosxsiny
thanks for any help