Trigonometric functions

Trigonometric functions

Trigonometric functions are functions of an angle. They are used to relate the angles of a triangle to the lengths of the sides of a triangle.

If we have a right triangle with one angle θ

 

Right Triangle

Then the following hold true

sineθ=ac

 

cosineθ=bc

 

tangentθ=ab

 

cosecantθ=ca

 

secantθ=cb

 

cotangentθ=ba

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