TITLE: Finding out various sine values from its graph.
QUESTION [1 upvotes]: Question (and Answer): 
The answer is written in thin black, inc = increasing, dec = decreasing. Am I wrong anywhere? 
Thanks!

REPLY [1 votes]: You are absolutely right in the increasing and decreasing value. Just when the graph goes up its increasing and when it comes down its decreasing. 
Its actually like lets have a function$f(x)$ and let $x_1$and $x_2$ be in its domain(the values the function can take up)

If a function is increasing then
  lets say that $$ x_1<x_2$$ 
  then $$f(x_1)<f(x_2)$$ and if the function is decreasing, if $$ x_1<x_2$$ then $$ f(x_1)>f(x_2)$$

Hope it helps.
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