Identities

Question 1

1 + Cot^2(x) =

Answer 1

Cosec^2(x)

Question 2

1 + Tan^2(x) =

Answer 2

Sec^2(x)

Question 3

Cos2x =

Answer 3

• Cos^2(x)-Sin^2(x)
• 2Cos^2(x) - 1
• 1 - 2Sin^2(x)

Question 4

1/2 - 1/2Cos2x =

Answer 4

Sin^2(x)

Question 5

1/2 + 1/2Cos2x

Answer 5

Cos^2(x)