cosbmw by marymactavish

Sum and Difference Proofs (continued ...)

A Quiz

PICT0015 by matt-hieu ergosteur

Proofs of the Sum and Difference Identities ...

Rotate ∠ROP so that OP lies on the positive x-axis

O O

TO BE COMPLETED

Proofs of the Sum and Difference Identities ...

Rotate ∠ROP so that OP lies on the positive x-axis

O O

Recall the Even and Odd Identities

sin(-x) = -sin(x) cos(-x) = cos(x) tan(-x) = -tan(x)

The sine and tangent functions are ODD functions. Cosine is an EVEN function.

Proofs of the Sum and Difference Identities ...

Rotate ∠ROP so that OP lies on the positive x-axisO

O

Recall the Even and Odd Identities

sin(-x) = -sin(x) cos(-x) = cos(x) tan(-x) = -tan(x)

The sine and tangent functions are ODD functions. Cosine is an EVEN function.