Select the true statement about triangle ABC. A. cos A = cos C
B. cos A = sin C
C. cos A = sin B
D. cos A = tan C

B

Step-by-step explanation:

cosA = = =

cosC = =

sinC = = =

tanC = = =

Then

cosA = sinC → B

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

true

step-by-step explanation: