Answer:
c
Step-by-step explanation:
Csc a - sin a = cos a cot a
1/sin a - sin a = cos a (cos a / sin a)
(1 - sin^2 a)/sin a = cos^2 a/sin a
cos^2 a/sin a = cos^2 a/sin a
Therefore, the given equation is an identity.
The answer to "12x-(4y+7z) for x=9 y= 4 and z = 2" is 78.
Zeroooo solutions bc i did it earlier
