Sine and cosine.
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subtract 90 from it and find the trig ratio of that and it will be equal to the trig ratio that is over 90 degrees
2sin(x), or 5.4cos(y), tan(z)
positively skewed with all values greater than or equal to zero
Just as with any other identity, a trigonometric identity is a trigonometric statement (other than a definition), which is true for all values of the variable or variables.
no a vector cannot have a component greater than the magnitude of vector