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Mathematics, 21.06.2019 19:00
Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers
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Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) β sinh2(x) = 1 and (b) 1 β tanh 2(x) = sech 2(x). solution (a) cosh2(x) β sinh2(x) = ex + eβx 2 2 β 2 = e2x + 2 + eβ2x 4 β = 4 = . (b) we start with the identity proved in part (a): cosh2(x) β sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 β sinh2(x) cosh2(x) = 1 or 1 β tanh 2(x) = .
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Mathematics, 21.06.2019 22:00
Given sinβ
= 1/3 and 0 < β
< Ο/2 ; find tan2β
a. (4β2)/9 b. 9/7 c. (4β2)/7 d.7/9
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Mathematics, 22.06.2019 01:30
Will mark brainliest! ( explain the answer too, it can be one sentence)
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