Trigonometric Double Angle Identities Answers

If cos(x) = and tan(x) < 0, what is sin(2x) ?

SimplifyAdditionCosine Difference Identity✔ Cosine Sum Identity

Cosine Sum IdentityAddition✔ SimplifyCosine Difference Identity

Over the interval [0, 2π), what are the solutions to sin(2x) = sin(x)? Check all that apply.0

Write the given expression as a single trigonometric function.

What is the value of 2cos2(105⁰) − 1?

If sin(x) = and cos(x) > 0, what is tan(2x)?

What are the correct justifications, listed in proper order?

Over the interval [0, 2π), what are the solutions to cos(2x) = cos(x)? Check all that apply.0

The table shows the derivation of tan(2x). Select the correct reason for each step.

The table shows the derivation of cos(2x). Select the correct reason for each step.

The table shows the derivation of tan(2x). Select the correct reason for each step.

If cos(x) = and tan(x) < 0, what is cos(2x)?

Double Angle Identity✔ Tangent Sum IdentityQuotient Identity for Tangent

Quotient Identity for TangentTangent Sum Identity✔ Simplify