Question

Prove the identity:

sin(x-y)cosx siny = tanx coty-1

[When you are finished, delete this text and the guidelines in the table below.]

Statement	Rule
Use this template to indicate your answer. You can create more rows if necessary. Indicate each step of your process in this column	Defend your process by identifying the appropriate explanation for each process step in this column.
Remember to: Identify the problem statement. Correctly use appropriate identities and/or theorems. Correctly use the algebraic process. Identify the final statement.

Answer 1

LHS = sin(x-2) cosa sing - Sinx cosa – Cosa sina cost sira - Sinx cosy - Copasing cosasing cost - Sinx & Cosz – 4. Cosa = tana & Col – 1 - Reis