Use a double angle identity to evaluate the the expression

Decide whether the equation is or is not an identity.sin (α + β) + sin (α – β) = 2 sin α cos β

Find the length of the arc intercepted by a central angle of

This course has required on-campus activities.

I must pass both a midterm and final exam in order to pass this course.

This course has been designed using OER (Open Education Resources) which are online and free.  No text purchase needed.

Commas When something seems too good to be true it usually is. 

Commas Kia called from upstairs, “Could you turn the TV down?”

Dangling and/or Misplaced Modifiers We noticed several dead animals driving along the wooded road.

Commas The man who came to the party with Joy says he was kidnapped by aliens.