1.2 任意角的三角函数（练案一）-2020年高中同步教与学数学(苏教版必修4)

书书书 !"# ! $ % & ' !!" ! !"#$%#&' !!"!! ! !"#$%#&' ! " () " * ! () ! !"#$%#&' !! !"# ! $%&'()*+, ! "#$%& " '"()#& #" -# ! ./ )0123 !!!! 01 ! "! # ! )$%45( " ! "# " &# #! # " * #" - ()# !!!!! ! &!#$% "+ ! , 67 !!!! ! -! / # $%& 8 " 9 #$%$ $ ()#% $ ./%& $ * " - # $%& 2 ! !! # 0! :#;#< !!!! 1! =#;#< 2! >#;#< 3! ?@AB +!' " ! #$% ' ! # " 4'(()# ! '( " ()# ! ' ! # 4'(./% & ! - $ #5(" ! 6 !!!! ! ,! !"( " ! 槡' &")#,#!)$%&'("C#$%!6 槡!& !& " D ) ! 7! DEF ) 6 #$%*./%槡 *48 ! 9 ()#*' # ! " )BGH ! :! !" " 23I01# " JAB #$% ! ()# " #$ ()# ! #$% " # )KL ! ;! !"# ! )$%/=M ) 6* & " D #$% ! 4()# ! )N ! !*! !"# " $%&'( " ! # " & #! # " * # C ()# " 6 槡!* !* # " D ./% " )N ! $ ! $ !" !!! #$ !!!!!!!!!!!!!!!!!!!!!!! %&'()*+ ! ,- " . # /0 * " () ! %#&'+,-. !! 9 ! % # )$%O7 ) PQR " -ST6UVW)2 ! !! # 0!#$% ! 6#$% # !!!!!! 1!()# ! 6()# # 2!./% ! 6./% # 3!(). ! 6(). # "! XY +" Z ,+ [\2# ! 6 7 ! : )]^MZ_^M " `aST bc8]A)2 ! !! # 0<+" $ ,+ $ * 1<,+ % * % +" 2<,+ $ +" $ * 3<+" % * % ,+ &! d;efg & " ! , h + ! , )]^Mi6 ' # ! & h - ! & )]jMi 6 ' $ ! - h + ! - )_^Mi6 ! k8lfgeF, ! !! # 0<! !!!!! 1<" !!!!! 2<& !!!!! 3<* -! # ! ! * $!$ " ! # )]^Mh_^M)mni6 " CKLio " `a ! )N, !!!! ! +! STpq8rs)2 ! !! # 0< ! 'Bt " uvw8)]^M'B 1< uvw8 " dix]^M)#i6 2< ! Z ! 4 ! dix)]jM 3< ydix]jM)ze#)$%/x'{=M& ,! !"# ! )_^M)mn?|7# ! )]^M)mn " `a# ! )$%}/3'01~)��2 !!!! ! 7! 9 ! - $!$ ! " " - #$% ! " ()# ! " ./% ! )|�O�2 !!!! ! :! ��;#EFMD�� ()# !& ! " )# ! )�� ! ;! ��uvw8);#EFMDxt�� #$% !' 槡& " " ()# !& 槡& " ) ! )�N�� ! !*! J�;#EF)BG�;#EFMz����� & � " ,: #t " ! $ #$% " 4()# "'槡"! $ " $ !" !!! #$ !!!!!!!!!!!!!!!!!!!!!!! %&'()*+ ! ,- " . # /0 !!"!" ! /#%#&'01 ! ! () " !! !" #$% ! 6 - + " ! 23I01# " `a ./% ! )N2 ! !! # 0<' - & 1<' & - 2< & - 3< - & "! �� ()# " !4()# " ' ()# " !'()# " �� ! !! # 0< '" ./% " " 1< " ./% " " 2<' " ./% " 3< " ./% " &! !" ./% ! 6' ! " " - !4"#$% ! ()# ! #$% " ! '()# " ! )N2 ! !! # 0< ! & 1<& 2<' ! & 3<'& -! ST�efg8 " �@VW)2 ! !! # 0<#$% ! 6 ! " C ()# ! 6 ! " 1<#$% ! 6* C ()# ! 6'! 2<./% ! 6! C ()# ! 6'! 3<