Answer:
Step-by-step explanation:
Given
(A)
We know that Sin(A + B) = SinA cosB + cosAsinB
Substituting in the above formula we get:
(B) Cos(A + B) = CosAcosB - SinASinB
(C) Tan(A + B) =
From the above obtained values this can be calculated and the value is .
Answer:
Step-by-step explanation:
Answer:
second one
Step-by-step explanation:
it is the second one , it has three expression starts with 5
when n=0 :2n+5=2(0)+5=5
n=1 : 2n+5=7
n=2: 2n+5=4+5=9
n=3: 2n+5=11