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					     Let's take a look at p. 321 Written Exercises...
1a) cos2q + sin2q          1b) (1 - cosq)(1 + cosq)
         1



                                    sin2q


1c) (sinq - 1)(sinq + 1)




        -cos2q
2a) 1 + tan2q       2b) (secx - 1)(secx + 1)
      sec2q



                               tan2x

2c) tan2x - sec2x
         -1
3a) 1 + cot2A                 3b) (cscA - 1)(cscA + 1)

       csc2A

                                           cot2A



3c)     1         -     1
      sin2A           tan2A



              1
4a)       1          b) 1   -     sin2q
      cos(90o - q)                tan2q



           cscq



 c) 1    -   1
   cos2q   cot2q
                                sin2q

             1
5a) cosqcot(90o - q)     b) csc2x(1 - cos2x)




           sinq

c)   cosq(secq - cosq)                1




           sin2q
6a) cotAsecAsinA       b)   cos2A(sec2A - 1)



          1



c) sinq(cscq - sinq)                sin2A




         cos2q
7) sinAtanA + sin(90o - A)   8) cscA - cosAcotA




                                     sinA

          secA
Period 1 - HW: p. 321 #10



Period 6/7 - HW: p. 321 #15,16



Period 9 - HW: p. 321 #9,15,16

				
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