Mid-segment and bottom side of the triangle is always parallel to each other, and parallel lines must have same slopes, so if their slopes are equal, then MN would be mid-segment of side AB in Triangle ABC
Hope this helps!
Answer:
its A
Step-by-step explanation:
an =a1+d(n-1)
where d is the common difference
d=5-8
d=-3
a1=8
an =8-3(n-1)
Choice C
Step-by-step explanation:
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Answer:
see explanation
Step-by-step explanation:
Using the identity
tan x = 
Consider the left side
= 
( multiply numerator and denominator by cos²x to clear fractions
= 
← ( cos²x + sin²x = 1 ]
= cos²x - sin²x
= right side , thus proven
