Pre-calculus simplify the expression

Calculus
Tutor: None Selected Time limit: 1 Day

cos(pi/2 -x)csc(-x)

May 28th, 2015

cos(pi/2 -x)csc(-x)     csc(-x)= 1/sin(-x)

cos(pi/2 -x) / sin(-x)

now cos(pi/2 -x) is the positive version of sin(-x) and vice versa. Which means that if x=1 y=-0.844 if you graph them seperately you see they are opposite of each other which means that you will get 0.8444/-0.84444 or 1/-1

which means that the simplification is actually -1. This is something you need to memorize not something that will be shown in simplifying

May 28th, 2015

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May 28th, 2015
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May 28th, 2015
Dec 3rd, 2016
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