tangent ratio

sine ratio

cosine ratio

hypotenuse

the side opposite the right angle in a right triangle

adjacent leg

the leg that touches a given acute angle in a right triangle

opposite leg

the leg across from a given acute angle in a right triangle

angle of elevation

the angle between a horizontal line (like the ground) and your line of sight, when you look up at an object

angle of depression

the angle between a horizontal line and your line of sight, when you look DOWN at an object

solve a right triangle

find the measures of all the sides and angles of a right triangle

inverse tangent

a function that gives the angle that has a given tangent

inverse sine

a function that gives the angle that has a given sine ratio

inverse cosine

a function that gives the angle that has a given cosine ratio

30-60-90 triangle

45-45-90 triangle

adjacent leg to angle A

Side z

opposite leg to angle A

Side y