Question

if a=cos3 and b=sin8,then​

Answer 1

Step-by-step explanation:

1c=57o

∴3c≈171o & 8c≈456o

a≈cos(171)≈cos(90+81)≈−cos81

b≈sin(456)≈sin(450+6)≈sin6

as we can see that a and b are different signholders, so ab<0