Cot(90) = 0 so 1/cot(90), if defined, would be 1/0. Such a fraction is not defined and that is what is wrong with the sentence.
It is the property that equals plus equals are equals.
82 degrees (180 degrees in a triangle)
A semicircle has 180 degrees
280
55 degrees.
No.
13 ounces equals 368.5 grams.
Pie equals 3.14159267584921
It is the property that equals plus equals are equals.
Associative Property of Multiplication
The following answer is correct only if b is the measure of an angle in degrees. The complement is 90-43 = 47 degrees.
61 degrees (180 degrees in a triangle)
98 degrees Celsius equals 208.4 degrees F
If a statement includes an "equals" sign ( = ) then the statement is an equation. By the way . . . it may or may not be a true statement. "10 equals 120" is not true.
It is a nonsensical statement.
-13 degrees F equals -25 degrees C
20 degrees Fahrenheit = -6.66 degrees Celsius.