What fraction of an hour is 50 minutes

Ответ:

savyblue1724707

16.01.2022

5/6

Step-by-step explanation:

All we need do is to try to change 50 minutes to hour.

Remember that 60 minutes make 1 hour , so we need to find 50 minutes out of 1 hour , that is 50 minutes out of 60 minutes. Which is 50/60. Therefore:

50 minutes is 50/60 fraction of an hour

50/ 60 is the same as 5/6 in reduced form

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Ответ:

bendlogan2687

16.01.2022

Mathematics

Step-by-step explanation:

1hour is 60minutes

= 50/60

= 5/6

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Ответ:

kobrien9146

14.12.2020

Mathematics

$\begin{aligned} \cos 4x + \cos 2x & = 2 - 2\sin^2(2x) - 2\sin^2 x \end{aligned}$ left-hand side: manipulate cos 4x to get: $\begin{aligned} \text{lhs} & = \cos 4x + \cos 2x \\ & = \cos\big[2(2x)\big] + \cos 2x \end{aligned}$ now we use cosine double angle identity as follows. we use the sine version of the cosine double angle identity because the right-hand side is exclusively in sine. $\begin{aligned} \cos 2x & = 1 - 2\sin^2 x \end{aligned}$ also $\begin{aligned} \cos\big[2(2x)\big] & = 1 - 2\sin^2 (2x) \end{aligned}$ so $\begin{aligned} \text{lhs} & = \cos\big[2(2x)\big] + \cos 2x \\ & = 1 - 2\sin^2 (2x) + 1 - 2\sin^2 x \\ & = 1 + 1 - 2\sin^2 (2x) - 2\sin^2 x \\ & = 2 - 2\sin^2(2x) - 2\sin^2 x\\ & = \text{rhs} \end{aligned}$

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