Question

if tan A = 1 and sin B = 1/ root 2 , find the value of cos (A + B)​

Answer 1

Answer:tanA=1

SoA=45°

SinB=1/√2

SoB=45°

Cos(A+B)

Cos(45+45)

Cos90°=0

Step-by-step explanation:

Answer 2

Answer:

cos(A+B)=0

cos(45+45)=cos(90)=0