document.write( "Question 1091305: For the function y=5/2sin(1/2x-22.5 degrees)-2 , State the transformations, in the order you would apply them. [2]\r
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Algebra.Com's Answer #706734 by greenestamps(13216)\"\" \"About 
You can put this solution on YOUR website!

First, you need to modify the argument for sine so that it is in the form p(x-q); then the q is the horizontal shift and the p determines the horizontal stretch or compression. So write the function as

\n" ); document.write( "\"y+=+%285%2F2%29sin%28%281%2F2%29%28x-45%29%29-2\"

\n" ); document.write( "The standard form for this kind of function is

\n" ); document.write( "\"y+=+%28a%29sin%28%28b%29%28x-c%29%29%2Bd\"

\n" ); document.write( "Where
\n" ); document.write( "a is the vertical stretch;
\n" ); document.write( "b determines the horizontal stretch;
\n" ); document.write( "c is the horizontal shift; and
\n" ); document.write( "d is the vertical shift

\n" ); document.write( "The order in which the transformations are applied is the order in which you would evaluate the expression for a given input value.

\n" ); document.write( "The innermost parentheses is (x-45); so apply the horizontal shift first.
\n" ); document.write( "Next is the multiplication (of the angle) by 1/2; so apply the horizontal stretch second.
\n" ); document.write( "Next is the multiplication (of the sine) by 5/2; so apply the vertical stretch third.
\n" ); document.write( "And last is subtracting 2, which is the same as adding -2, so apply the vertical shift last.
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