H- Flashcard Identities (Basic & Sum/Diff)

Front

What is the Pythagorean identity for sine and cosine?

Back

sin²θ + cos²θ = 1

Front

What is the relationship between tangent and sine/cosine?

Back

tanθ = sinθ / cosθ

Front

What is the definition of cosecant?

Back

cscθ = 1/sinθ

Front

What is the definition of secant?

Back

secθ = 1/cosθ

Front

What is the definition of cotangent?

Back

cotθ = 1/tanθ = cosθ/sinθ

Front

How do you simplify the expression (1 + tan²θ)?

Back

1 + tan²θ = sec²θ

Front

What is the formula for the difference of squares?

Back

a² - b² = (a - b)(a + b)