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Dimas [21]
1 year ago
9

Instruction: use the ratio of a 30-60-90 triangle to solve for the variables. Leave your answers as radicals in simplest form.u=

v=

Mathematics
1 answer:
almond37 [142]1 year ago
6 0

Let's start by identify a 30-60-90 triangle

If we compare those two traingles we can stablish the following relation:

\begin{gathered} a\sqrt[]{3}=6\sqrt[]{3} \\  \end{gathered}

Therefore, a=6

u is the opposite side to the 90° angle, therefore

\begin{gathered} u=2a \\ u=2\cdot6 \\ u=12 \end{gathered}

on the other hand, v is the opposite side to the 30° angles, so

\begin{gathered} v=a \\ v=6 \end{gathered}

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Solve 4 cos2x-3 = 0 for all real values of x.
vichka [17]

4 cos² x - 3 = 0

4 cos² x = 3

cos² x = 3/4

cos x = ±(√3)/2

Fixing the squared cosine doesn't discriminate among quadrants.  There's one in every quadrant

cos x = ± cos(π/6)

Let's do plus first.  In general, cos x = cos a has solutions x = ±a + 2πk integer k

cos x = cos(π/6)

x = ±π/6 + 2πk

Minus next.

cos x = -cos(π/6)

cos x = cos(π - π/6)

cos x = cos(5π/6)

x = ±5π/6 + 2πk

We'll write all our solutions as

x = { -5π/6, -π/6, π/6, 5π/6 } + 2πk integer k

3 0
3 years ago
Kayla drives 15 miles in 20 minutes. If she drove one hour in total at the same rate,
Rudik [331]

Answer:

45 miles

Step-by-step explanation:

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then multiply: 0.75 x 60 = 45

3 0
3 years ago
The Mariners buy jerseys wholesale for $48 and sells for $468. What’s the markup rate?
AlekseyPX

Answer:

975%

Step-by-step explanation:

468/48 - 9.75

9.75 in percent form is 9.75*100=975%

Too much for a Mariners jersey if you ask me :D

8 0
3 years ago
Please help...
Aleksandr [31]
To do this you have to times the number of fabric by the length of each fabric
so you have 6*5/8=30/8=15/4 or 3.75
8 0
3 years ago
Find the percent of the total area under the standard normal curve between the given z-scores. z= -1.10 and z= -0.36
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3 years ago
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