1. упростить

2sina sinb+cos(a+b) если a-b=П/4

 

2. вычислить

 (sin12-cos72)^2 +  (sin12+cos72)^2

 

3. найти sina,cos2a,sin2a если cosa=-11/15

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.