Trig Identities

Front

What is the definition of sec x?

Back

sec x = 1/cos x

Front

What is the Pythagorean identity involving sin and cos?

Back

sin²x + cos²x = 1

Front

What is the definition of csc x?

Back

csc x = 1/sin x

Front

What is the relationship between sec²x and tan²x?

Back

sec²x = 1 + tan²x

Front

What is the definition of cot x?

Back

cot x = 1/tan x = cos x/sin x

Front

What is the definition of tan x?

Back

tan x = sin x/cos x

Front

What is the relationship between csc²x and cot²x?

Back

csc²x = 1 + cot²x

Front

What is the definition of cos x?

Back

cos x = adjacent/hypotenuse in a right triangle.

Front

What is the definition of sin x?

Back

sin x = opposite/hypotenuse in a right triangle.

Front

What is the relationship between sin x and csc x?

Back

sin x = 1/csc x