Simplify the expressioncot^2x - cot^2x cos^2x
1 answer:
Cot^2x - cot^2x cos^2x
= cot^2x - {(cot^2x)(cos^2x)}
= cot^2x { 1 - cos^2x }
= cot^2x { sin^2x }
= (cos^2x/sin^2x) { sin^2x }
= cos^2x
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Note for probability, if it will never happen the P = 0. If it must happen P = 1.
So certain to happen:
C. P=1
1) 4
2) 16
3) 16
4) 6
5)12
6) 4
(6,(31pi/180)+2 n pi)
(-6,(31pi/180)+2 n pi)
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1.) Simply to 1/5 and 1/10
2.) put in decimal form 1/5= .2 and 1/10 = .1
3.) Add = .3
