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3 years ago

Solve : sin 3x + cos 3x=0

1 answer:

4 0

sin(3)+cos(3)sin(3)tan(3)3=0=−cos(3)=−1=−4+,∈ℤ=−12+3
sin⁡(3x)+cos⁡(3x) =0 sin⁡(3x) =−cos⁡(3x) tan⁡(3x) =−1 3x =−
π
4
+kπ,k∈
Z
x =−
π
12
+
k
π
3

Since −<<
−
π
<
x
<
π
, −2≤≤3
−
2
≤
k
≤
3
. Thus, the solution set is
{−34,−512,−12,4,712,1112}

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andreyandreev [35.5K]

we can use height formula

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we know that

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so, we can plug these values

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$h(t)=-\frac{1}{2}*32 t^2+18.5t+4.5$

$h(t)=-16 t^2+18.5t+4.5$

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we can use pythagoras theorem

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7 0

3 years ago

An awards dinner costs $225 plus $5 for each person making reservations the total bill is $735 how many people attended the dinn

suter [353]

The number of people attended dinner is 102.

<h3>What is an Equation ?</h3>

An equation is a mathematical statement when two algebraic expressions are equated by an equal sign.

It is given in the question that

An awards dinner costs $225 plus $5 for each person making reservations

the total bill is $735

people attended the dinner = ?

Let x number of people attended the dinner

$225 + $5 * x = $735

5x = 735-225

5x = 510

x = 102

Therefore , 102 people attended the dinner.

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2 years ago

Solve : sin 3x + cos 3x=0​

Solve : sin 3x + cos 3x=0