Use special right triangles to solve for the value of x.

x = 7

Step-by-step explanation:

Using the tangent ratio in the right triangle and the exact value

tan45° =

tan45° = =

Multiply both sides by x

x × tan45° = 7, that is

x × = 7

Multiply both sides by

x = 7

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