Double Angle Trig Identities Solving Equations

Solve for theta.

• A

• B

• C

• D

Solve for theta.

• A

• B

• C

• D

Solve for theta.

• A

• B

• C

• D

Solve for theta.

• A

• B

• C

• D

• A
• B
• C
• D

• A
• B
• C
• D

Use a double-angle to find the exact value of each expression

cos θ = 4/5 and 270° < θ < 360°Find sin 2θ

• -1/5

• 24/25

• -24/25

• -25/24

expand
cos(2θ)

• cos²θ-sin²θ

• 2sinθcos

• 2cos²+1

• sin²θ-1

Use a double-angle identity to find the exact value of each expression cos θ = 4/5 and 270° < θ < 360° Find sin 2θ

Hint: Are the terms in the best order??

• A

• B

• C

• D