Question

determine o cossecante : cossec.30°+cossec.390°​

Answer 1

Resposta:

Explicação passo-a-passo:

cossec30° + cossec390° = cossec30° + cossec(390°-360°)= cossec30° + cossec30° = 2cossec30° = 2.2 = 4

Answer 2

Resposta:

cossec.30°+cossec.390°

1/sen 30 + 1/sen 390

390=360+30

1/sen 30 +1/sen 30 =1/2+1/2= 1