Verified answer

De acordo com a calculadora do meu celular, deu isso aí:

a) y=1

b) y=TT

c)y=0

d) y=0

e) y=0

a) y = sen180° + cos360° = 0 + 1 = 1

b) y = cos TT + sen2TT = -1 + 0 = -1 + 0 = -1

c) y = sen90° + sen270° = 1 - 1 = 0

d) y = cos270° + sen180° = 0 + 0 = 0

e) y = cos90° .sen60° + sen330° .sen315° . sen180° = 0

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