Answer:
x · 5 ≥ 17
Step-by-step explanation:
67 + 32 =99
i think that angle c would be 81
Answer:
250
Step-by-step explanation:
Cos (a-b) = cos(a)cos(b) + sin(a)sin(b)
cos (a+b) = cos(a)cos(b) - sin(a)sin(b)
so, cos(a-b) - cos(a+b) =
=cos(a)cos(b) + sin(a)sin(b) - [cos(a)cos(b) - sin(a)sin(b)]
=2sin(a)sin(b)