Which value of x satisfies the equation sin40=cosx

Mathematics

1 answer:

svp [43]3 years ago

6 0

Answer:

Try to use your calculator and just substitute values

Step-by-step explanation:

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Anna paid $4 for renting a video game for 4 days. Which graph shows the relationship between the costs of renting a video game f

Andreas93 [3]

She paid $ 4 for renting a video game for 4 days...that means she paid $ 1 per day.

A horizontal axis is labeled days, a vertical axis is labeled cost of rental.
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ur equation is gonna be y = x

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4 years ago

Divide and write the result in standard form: 3-i/1+5i

Ket [755]

We are asked to write the following fraction of complex numbers in standard form: $\displaystyle{ \frac{3-i}{1+5i}$ .

Whenever we are dividing by a complex number by another complex number a+bi, to write the result in standard form, we multiply the expressions in the numerator and denominator by the conjugate of a+bi, that is a-bi:

$\displaystyle{ \frac{3-i}{1+5i}= \frac{(3-i)(1-5i)}{(1+5i)(1-5i)}$

in the numerator we distribute (3-i) to 1 and -5i, in the denominator we use the difference of squares formula $(a-b)(a+b)=a^2-b^2$ , and $i^2=-1$ :

$\displaystyle{ \frac{(3-i)(1-5i)}{(1+5i)(1-5i)}= \frac{(3-i)\cdot1+(3-i)\cdot(-5i)}{1^2-(5i)^2}= \frac{3-i-15i-5}{1-25i^2}$

$\displaystyle{= \frac{-2-16i}{1+25}= \frac{-2-16i}{26}=-1/13-(8/13)i$

Answer: D

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3 years ago