How do you prove similarity in math?
1 answer:
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To find the difference, we are going to destroy the parenthesis first, and then, we are going to perform the operations. Remember that to destroy a parenthesis preceded by a negative sign (-), you should change the signs of the factors inside the parenthesis:
Now we can factor both numerator and denominator and simplify:
We can conclude that the difference in simplest form is:
Now we can factor both numerator and denominator and simplify:
We can conclude that the difference in simplest form is:
Use inverse cosine here because you have the side adjacent to angle A and the hypotenuse. On your calculator, press the 2nd key then cosine to see this on your display 
then enter 8/17 to give you an angle measure of 62 degrees.