5.4 Sum and Difference Identities for Sine and Tangent
Sine of a Sum or Difference
Tangent of a Sum or Difference
Find the exact value of each expression
Write each function as an expression involving functions of θ.
Finding Function Values and the Quadrant of A + B
Suppose that A and B are angles in standard position, with
Find each of the following:
c) the quadrant of A – B
Verifying An Identity using Sum and Difference Identities
Verify that the equation is an identity.