The value of cos 480*sin 150+sin 600*cos 390=
Answers
Answered by
0
Step-by-step explanation:
cos (450+30) * sin ( 180-30) + sin (630-30) * cos ( 360+30)
= -sin 30*sin 30 + (-cos 30) * cos 30
= -sin²30 - cos²30
= -(sin²30 + cos ²30)
= -1
Similar questions