Simplifying/Verifying Trig Identities

Front

What is the Pythagorean identity for sine and cosine?

Back

sin²x + cos²x = 1

Front

What is the definition of secant (sec)?

Back

sec(x) = 1/cos(x)

Front

What is the definition of cosecant (csc)?

Back

csc(x) = 1/sin(x)

Front

What is the definition of cotangent (cot)?

Back

cot(x) = cos(x)/sin(x)

Front

What is the relationship between tangent and sine/cosine?

Back

tan(x) = sin(x)/cos(x)

Front

Simplify: sin²x + cos²x

Back

1

Front

Simplify: 1 + tan²x

Back

sec²x

Front

Simplify: cot²x + 1

Back

csc²x

Front

What is the double angle formula for sine?

Back

sin(2x) = 2sin(x)cos(x)

Front

What is the double angle formula for cosine?

Back

cos(2x) = cos²x - sin²x