Trigonometric Identities and Formulas Quiz

What is the result of applying the difference formula to cosine of (π/2 - x)?

• cosine of x

• sine of x

• tangent of x

• secant of x

Which pattern is identified when using the sum and difference formulas on a product of a sum and a difference?

• Sum of cubes

• Sum of two squares

• Difference of cubes

• Difference of two squares

When simplifying cosine squared of x minus sine squared of y, which identity is primarily used?

• Pythagorean identity

• Reciprocal identity

• Quotient identity

• Even-odd identity

What is the simplified form of the expression using the cosine difference formula?

• tangent of x

• secant of x

• negative sine of x

• cosine of x

Using the tangent sum formula, what is the result when tangent of 3π is involved?

• 0

• 1

• π

• Undefined