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Westkost [7]
3 years ago
13

What is exact value of cos7pi/6

Mathematics
1 answer:
victus00 [196]3 years ago
7 0
0.523598775598299 lol I believe
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Given that tan 0=-4/7 , and 270 degrees <0<360 degrees , what is the exact value of sec0?
Elanso [62]
I take it you meant θ angle, anyway.

we know the tan(θ) = -4/7... alrite, we also know that 270° < θ < 360°, which is another to say that θ is in the IV quadrant, where the adjacent side or "x" value is positive whilst the opposite side or "y" value is negative.

\bf tan(\theta )=\cfrac{\stackrel{opposite}{-4}}{\stackrel{adjacent}{7}}\impliedby \textit{now let's find the \underline{hypotenuse}}&#10;\\\\\\&#10;\textit{using the pythagorean theorem}&#10;\\\\&#10;c^2=a^2+b^2\implies c=\sqrt{a^2+b^2}&#10;\qquad &#10;\begin{cases}&#10;c=hypotenuse\\&#10;a=adjacent\\&#10;b=opposite\\&#10;\end{cases}&#10;\\\\\\&#10;c=\sqrt{7^2+(-4)^2}\implies \implies c=\sqrt{65}\\\\&#10;-------------------------------\\\\&#10;sec(\theta )=\cfrac{\stackrel{hypotenuse}{\sqrt{65}}}{\stackrel{adjacent}{7}}
6 0
3 years ago
HELP ASAP ASAP HELP HELP ASAP ASAP
PolarNik [594]

Answer:

8x+8

11x+3y

Step-by-step explanation:

it's just the normal addition if 1+2

5 0
3 years ago
Wich equation best represent the relation ship between x and y plz answer
Llana [10]

Answer:

.

Step-by-step explanation:

6 0
3 years ago
5<br><br> ——<br> ——<br><br><br> i need help!!<br><br><br> ————-<br> math geniuses pls help me!
34kurt

Answer:

C

Step-by-step explanation:

  x = 7 cos (2pi/3)            y =  7 sin (2pi/3)

  x = -7/2                          y = 7 sqrt(3) /2

5 0
2 years ago
Maya bought T-shirts for $24. Each T-shirt cost $4. How many T-shirts did<br> she buy
marta [7]

Answer:

6

Step-by-step explanation:

24/4 = 6

hope this helps

7 0
3 years ago
Read 2 more answers
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