Question

Sin A + sin B=2 হলে, cos(A-B) এর মান কত?​

Answer 1

Answer:

1

Step-by-step explanation:

maximum value of Sinx =1

=> sin A is 1 at the same time sin B is also 1.

=> A=B=90°

cos(A-B)=cos(90-90)=cos0=1