Verify the identity. tan x plus pi divided by two = -cot x

Given data  sin (x+pi/2)=cos xnow using sin lawsin(a+b)=sin(a)cos(b)+cos(a)sin(b)now using above valuessin(pi/2+x)=sin(pi/2)cos(x)+cos(pi/2)sin(x)as we know thatsin(pi/2)=1cos(pi/2)=0now putting these valuessin(pi/2+x)=1*cosx+0*1sin(pi/2+x)=cosxhence proved thatsin (x+pi/2)=cos x 

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.