Daily Challenge 1: Odd-and-Even and Cofunction Identities

• neither odd nor even function

• neither odd nor even function

• neither odd nor even function

• red and blue

• green and blue

• red and green

• symmetric with respect to the x-axis

• symmetric with respect to the y-axis

• symmetric with respect to the origin

• not symmetric

• symmetric with respect to the x-axis

• symmetric with respect to the y-axis

• symmetric with respect to the origin

• not symmetric

This means we can describe sine as

Since

• sine is an odd function

• sine is an even function

• cosine is an odd function

• cosine is an even function

We can derive the Cofunction Identity