Mathematics, 30.07.2020 03:01 missdaisy789
A student bought a sandwich for 80 cents, milk for 20 cents, and pie for 30 cents. How much did the
meal cost?
A $1.00
B
$1.20
C$1.30
D $1.40
E $1.60
Answers: 1
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Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .
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A student bought a sandwich for 80 cents, milk for 20 cents, and pie for 30 cents. How much did the...
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