The triangle for the vector additio

The triangle for the vector addition of T and P is shown in Fig. b. The angle  is calculated as above. The law of cosines gives
Ans.
From the law of sines, we may determine the angle
which orients R. Thus,
Ans.

ผลลัพธ์ (อังกฤษ) 3:

The triangle for the vector addition of T and P is shown in Fig. B. The angle is calculated as above. The law of cosines. Gives.Ans.From the law, of SINEs we may determine the angle which orients, Thus R.Ans.