# Trigonometry Tricks 4

## csc(90° - x) = sec x

## sec(90° - x) = csc x

## This is the reciprocal version of the 1st trigonometry trick!

__Examples:__

csc 75° = 1.035276...

sec 15° = 1.035276...

csc 45° = 1.414213...

sec 45° = 1.414213...

**(Notice that the secant & cosecant of 45 degrees are exactly the same!)** They are equal to the square root of 2 since the sine & cosine of 45 degrees are both equal to the square root of 1/2!

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© Derek Cumberbatch