Practice!

Sample Problem

Select the correct complement of θ=2.5 radians

0.6416

-0.9292

1.5578

this angle does not have a complement

Select the correct supplement of θ=2.5 radians

1.5578

0.9292

0.6416

this angle does not have a supplement

Solution

Two positive angles are complements of each other if their sum is π/2; two positive angles are supplements of each other if their sum is π.

Θ=2.5 is in radians;

π/2-2.5=-0.9292 because 2.5>π/2, therefore θ=2.5 does not have a complement.

π-2.5=0.6416, which is its supplement