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Verify the identity.

(1 − cos(β))(1 + cos(β)) = 

1/

csc2(β)

 

Expand the product, and then use a Pythagorean Identity.

(1 − cos(β))(1 + cos(β)) = 1 − (____)??????

 

  = ?????

 


Use a Reciprocal Identity.

                             = ??????

 

THREE BLANKS IN THIS QUESTION PLEASE HELP

 Dec 4, 2019
 #1
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+1

First part    1/ csc2 x   = 1 /  1/sin2x  = sin2x

    so     1 - sin2x       (remember: this = cos2x )

        can you try it from there?

 Dec 4, 2019

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