<C=100°, <B=40°, b=9 найти <А, а, c

To find angle A, side a, and side c, we can use the Law of Sines which states:

a/sinA = b/sinB = c/sinC

First, let's find angle A:

sinA/a = sinB/b sinA/ a = sin(40°)/9 sinA = (a * sin(40°))/9 A = sin^(-1)((a * sin(40°))/9)

Next, let's find side a:

a/sinA = b/sinB a = (b * sinA)/sinB a = (9 * sin(A))/(sin(40°))

Finally, let's find side c:

c/sinC = b/sinB c = (b * sinC)/sinB c = (9 * sin(100°))/sin(40°)

Therefore, angle A, side a, and side c can be found using the above calculations.