More Trigonometric Identities

Section 5.2



How is this done? Can you do 59 step by step? Thank you.

 

59.


Use the following identity:



replace x with (x-1)/4

=

=...........since

=.................-x^2 + 2x + 15 complete square, and you get 16 - (x - 1)^2

=

 

I will do 57, 58, and 60 before going to the next section. Nicely-done.