<span>2 + 15a - 2
= 15a (because 2 - 2 = 0)
hope it helps</span>
Well the solution to this problem is x < -4
Rule of trigonometric functions:-
sin a = cos(90 - a)
Here a = 90°.
sin 90 = cos (90 - 90)
1 = cos 0.
cos 0 = 1.
So the cos 0 = 1.
The answer is D.
Explanation: The square root of a negative number is imaginary which is another name for a complex number
-2x-y=3 ...(1)
x+2y=4 ...(2)
multiply (2) by 2 and add to (1)
-2x-y+2x+4y=3+8
3y=11
y=11/3
from (2)
x=4-2y=4-2(11/3)
or x=4-(22/3)
=(12-22)/3=-10/3
