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1 year ago

What is the value of cos(150°)?

Mathematics

1 answer:

baherus [9]1 year ago

4 0

ANSWER

$-\frac{\sqrt[]{3}}{2}$

EXPLANATION

Given

$\begin{gathered} \cos \text{ 150} \\ \end{gathered}$

We can find cos 150 by using

$\begin{gathered} \cos (180-\theta)=-\cos \theta \\ \Rightarrow\cos (180-\theta) \\ =-\cos 30 \end{gathered}$

recall that

$\begin{gathered} \cos 30=\frac{\sqrt[]{3}}{2} \\ \end{gathered}$

Hence,

$\begin{gathered} \cos 150=-\cos 30 \\ =-\frac{\sqrt[]{3}}{2} \\ \end{gathered}$

Therefore, the value of cos 150 is

$-\frac{\sqrt[]{3}}{2}$

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Answer:

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Step-by-step explanation:

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3 years ago

Zak takes 3 steps for every 2 steps Rich takes. How many steps will zak take if rich takes 18 steps? Explain how you found the a

vodka [1.7K]

To solve this problem we can think of a rule of three.
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answer
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3 years ago

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Fynjy0 [20]

Answer:

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3 years ago

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Answer:

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<u>Exercise 3</u>

$-3x + 5y = 2$

$\implies 5y = 3x + 2$

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2 years ago

Read 2 more answers

Write the expression as a square of a binomial: 49x^2+12xy+64y^2

DiKsa [7]

STEP
1
:
Equation at the end of step 1

((49 • (x2)) + 12xy) + 26y2
STEP
2
:

Equation at the end of step
2
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(72x2 + 12xy) + 26y2
STEP
3
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Trying to factor a multi variable polynomial

3.1 Factoring 49x2 + 12xy + 64y2

Try to factor this multi-variable trinomial using trial and error

Factorization fails

Final result :
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3 years ago