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Readme [11.4K]
3 years ago
9

PLZ HELP!!! 10 POINT REWARD!!!

Mathematics
2 answers:
ehidna [41]3 years ago
5 0
Division property of equality, because you have to divide 8x and 80 by 10

d1i1m1o1n [39]3 years ago
3 0
Division property of equality
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Which expression is equivalent to sec^2x − 1? a. cot2x b. tan2x c. csc2x d. cos2x
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Sec^2 x - 1 = tan^2x

Proof:
Sec^2x = 1+ tan^2x

1/cos^2x = 1 + sin^2x/cos^2x

<span>1/cos^2x - sin^2x/cos^2x = 1
</span>Using common denominator:
(1-sin^2x)/cos^2x = 1
sin^2x + cos^2 x = 1
cos^2 x = 1 - sin^2x
Substituting : 
cos^2x/<span>cos^2x = 1
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