








Trigonometry
Functions 


























































































































































































Functions of
angles 
















side opposite
/ hypotenuse = sine 
side adjacent / side opposite = cotangent 










side adjacent
/ hypotenuse = cosine 
hypotenuse / side adjacent = secant 










side opposite
/ side adjacent = tangent 
hypotenuse / side opposite = cosecant 










Finding the
length of sides in right angle triangles when an angle and side are known 









Length of side
opposite = 
hypotenuse x sine 







hypotenuse / cosecant 






side adjacent x tangent 






side adjacent / cotangent 












Length of side adjacent = 
hypotenuse x cosine 







hypotenuse / secant 







side opposite x cotangent 






side opposite / tangent 












Length of hypotenuse = 
side opposite x cosecant 






side opposite / sine 







side adjacent x secant 






side adjacent / cosine 











