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Mavzuni mustahkamlash uchun misollar.










1. cos x













1



































































2






















































































































































































































x

arccos







1




2

n





































2



















































































































x




2













2 n














































3































































































































2. sin 2x

1


























































2x






















2 n n




z








































2

























































































































x






















n










n

z






























































































4












































































3. 4 cos x

1




2 cos 2x

1

0



































































































































































cos x

1







x

arccos

1




2 n

4 cos x

1




0







4







4




2 cos 2x

1

0













1




2




n

z




cos 2x

2x




2 n




















































2




3


































































































































x




arccos

1




2 n





































4






















































































































2x




























n

n

z


































3

























































































































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