Решите умоляю!!!!!!!

1.

Вычислите sin a/2 и cos a/2, если cos a= - 1/8, пи<a<3 пи/2

2.

Докажите равенство 4 cos 25 - 3 sin 65/sin 115 =1

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.