Complementary Angles Trig

Find the measure of the missing angle.

• 90^o

• 8^o

• 108^o

• 18^o

sin (72) = cos (____)

• 90^o

• 8^o

• 108^o

• 18^o

tan (55) = reciprocal of tan (____)

• 90^o

• 20^o

• 125^o

• 35^o

Find the measure of the missing angle.

• 90^o

• 10^o

• 130^o

• 40^o

cos (50) = sin (____)

• 90^o

• 10^o

• 130^o

• 40^o

sin (35) = cos (____)

• 90^o

• 20^o

• 125^o

• 55^o

Find the measure of the missing angle.

• 90^o

• 20^o

• 125^o

• 35^o

If cosA = sinB then the two angles A and B have to be:

• supplementary

• complementary

• adjacent

• a linear pair

If α and β are complementary angles, why is sin α = cos β?

• There is no reason, that is just the way it is.

• The adjacent leg to β is the opposite leg to α.

• Because α = β.

• Because α and β are greek letters.

What is the missing angle?
cos 12^o = sin _^o

• 168^o 

• 78^o

• 88^o

• 178^o