Answer:60 3/4
Step-by-step explanation:you multiply 81/4 times 3 and get 243/4 so you divide 243 divided by 4 and the answer is 60 3/4
13, 100 and 67° triangle shows that the side opposite the larger angle is the larger side .
Answer:
B
Step-by-step explanation:
(x-coordinate, y-coordinate) and the horizontal axis refers to the x-axis and the vertical axis refers to the y-axis.
Answer:
cos(60) cos(-20) - sin(60) sin(-20) = cos (40)
Step-by-step explanation:
Using the trigonometric identity rule:
![\cos(A+B) = \cos A \cos B- \sin A \sin B](https://tex.z-dn.net/?f=%5Ccos%28A%2BB%29%20%3D%20%5Ccos%20A%20%5Ccos%20B-%20%5Csin%20A%20%5Csin%20B)
Given that:
cos(60) cos(-20) - sin(60) sin(-20)
Let A = 60 and B = -20
then;
Using identity rule:
![\cos (60) \cos (-20)- \sin (60) \sin (-20) = \cos(60+(-20)) = \cos (60-20)=\cos 40](https://tex.z-dn.net/?f=%5Ccos%20%2860%29%20%5Ccos%20%28-20%29-%20%5Csin%20%2860%29%20%5Csin%20%28-20%29%20%3D%20%5Ccos%2860%2B%28-20%29%29%20%3D%20%5Ccos%20%2860-20%29%3D%5Ccos%2040)
Therefore, the following as a function of a single angle is cos (40)