Npocture bbipakehne [133, 134].
33.1) sin? a + cos2 a + tg2 a;
a)- tg a + ctg a ;
1-tg2 a 1-ctg2 a'
sin a
sin a
3) 1 + cos a + 1 - cos a:
sinº a - cos4 a + cos2 a;
5) tg2 a cosa a + ctg2 a sin2 a;
6) cos4 a + sina a cos? a + sin? a.
cos3 a - sin3 a.​

Лика1508 Лика1508    1   27.09.2019 17:56    1

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eriksan1 eriksan1  27.09.2019 19:10

1. do your parents let you go out in the evenings?    

2. i am not allowed to go out on sunday nights.  

3. are pupils at your school allowed to wear jeans?  

4. our teacher does not let us eat in class.

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