Answer:
b
Step-by-step explanation:
Given

Substitute x = 3 into the expression
= 
= 
=
= 0 → b
ur answer to ur problem should be 2
Answer:
17
Step-by-step explanation:
by Pythagoras

x=17
Recall that the reciprocal of the csc function is the sin function, which is an odd function. The angle -pi/6 has its terminal side in Quadrant 4, for which the opposite side is negative, important in determining the sign of csc(-pi/6).
sin(-pi/6) = - sin(pi/6) = -1/2.
Thus, csc(-pi/6) = -1 / (-1/2), or +2 (answer)
23x25 is the same as 46x50 because you just multiplied both by two