Find all possible values for each expression. tan^-1 (-r3) PLEASE HEL LOTS OF POINTS!!! Trig a. 120° + 180°n b. 60° + 180°n c. 120° + 360°n d. 60° + 360°n

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

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step-by-step explanation:

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you should go to the second answerthey explain it very well, give me a like