вычислить:

1) sin 30 • sin 42° - cos 3º • cos 42°

2) sin 108⁰ • sin 252⁰ - cos 252° • cos 108⁰

3) sin53° • cos7° - cos 53° • sin (-7).

4) sin 390° • sin150° + cos210° • cos150° + tg240° • tg210°;

5) sin105 • sin15° + cos 75° • cos165° - ctg 65°. tg245 ​
Please enter comments
Please enter your name.
Please enter the correct email address.
You must agree before submitting.

Answers & Comments


Copyright © 2024 SCHOLAR.TIPS - All rights reserved.