Is that the whole equation? Exactly from the book or paper?
Answer:

Step-by-step explanation:
To solve any equation we use PEDMAS rule(this is the sequence of priorities) where:
P: Parentheses
E: Exponent
D: Division
M: Multiplication
A: Addition
S: Subtraction
In the expression
,there is only one operation is used that is multiplication.

They all end up being 1
100% = 1
4/4 = 1
1.000 = 1
Answer:
Yes, any pair of complementary angles add up to 90 degrees. By simply using 90-x you can find the other angle.