Can someone help me with my question? I don’t understand how to do this.

As we can see by the 60 degree mark at angle C, we know this is a 30-60-90 triangle. I have attached an image of the relationship for a 30-60-90 triangle.

Using the example of y = 1, we can see that x the other leg of the triangle would be y.

So, x is equal to y, which we got from using the relationship shown in the attached image. The correct answer is the fourth option.

Hope this helps! :)

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