Question

How do you find sin 7(pi) / 2 by referring to the graph of the sine or cosine function?

Answer 1

Find sin ((7pi)/2) on the sine graph.

Ans: -1

Explanation:

`sin ((7pi)/2) = sin (2pi + (3pi)/2) = sin ((3pi)/2)`.
The sine graph shows--> `sin ((3pi)/2) = -1`
On the graph, the value of `sin ((3pi)/2)` appears at x = 4.71
graph{sin x [-10, 10, -5, 5]}