The correct order of operations in trigonometry is PEMDAS, which stands for Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).
No, parentheses are only necessary when there are multiple operations within a single equation and you want to specify which operations should be done first. If there is only one operation, parentheses are not needed.
No, the order of operations is a mathematical rule that must be followed in order to get the correct answer. Changing the order of operations will result in an incorrect answer.
You should always follow the order of operations, starting with parentheses, then exponents, then multiplication and division, and finally addition and subtraction. If there are multiple operations of the same type, they should be solved from left to right.
If you don't follow the order of operations, you will get an incorrect answer. This is because the order of operations ensures that the equation is solved in a specific and consistent manner, resulting in the correct answer.