Trigonometry

 
Section 7.5

 Derivation of the double angle identities

 Example to help with part a & b of homework exercises 7-18

 Example to help with homework exercises 30-34

 Example to help with exercises 35-56 and derivation of tan2A identity

 Derivation of half angle identities & example to help with homework exercises 19-28

 Example to help with parts c & d of homework exercises 7-18

 Example to help with homework exercises 57-68