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suter [353]
3 years ago
14

Plz help ill give brainliest

Mathematics
2 answers:
Inessa [10]3 years ago
5 0

Answer:

I'm sorry idk

Step-by-step explanation:

riadik2000 [5.3K]3 years ago
4 0

Answer:

ok but mark me brinlest then ill help u ok

Step-by-step explanation:

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Which expression is equivalent to cos120°? ° cos240° cos300° cos420°?
Anon25 [30]

Answer:

Option 1 - cos 240°

Step-by-step explanation:

Given : Expression \cos 120^\circ

To find : Which expression is equivalent to given expression ?  

Solution :

The given  expression is equivalent to those whose value is same as \cos 120^\circ

Value of

\cos 120^\circ= \cos (180-60)

\cos 120^\circ= -\cos 60

\cos 120^\circ= -\frac{1}{2}

value of cos in second quadrant is negative.

Option 1 : \cos 240^\circ

\cos 240^\circ= \cos (180+60)

\cos 240^\circ= -\cos 60

\cos 240^\circ= -\frac{1}{2}

Equivalent

Option 2 : \cos 300^\circ

\cos 300^\circ= \cos (360-60)

\cos 300^\circ= \cos (2\times 180- 60)

\cos 300^\circ= \cos (60)

\cos 300^\circ= \frac{1}{2}

Not equivalent

Option 3 : \cos 420^\circ

\cos 420^\circ= \cos (360+60)

\cos 300^\circ= \cos (2\times 180+60)

\cos 420^\circ= \cos 60

\cos 420^\circ= \frac{1}{2}

Not equivalent

Therefore, Correct option is 1.

\cos 120^\circ=\cos 240^\circ=-\frac{1}{2}

5 0
3 years ago
Read 2 more answers
Solve |x + 3|= -6
Rudik [331]

Answer:

The equation has NO solution ⇒ C

Step-by-step explanation:

  • An absolute value of a number means the value of the number without its sign
  • IxI = m, then x = m or x = -m
  • Example: I2I = 2 and I-2I = 2

<u><em>V.I.N:</em></u><em> </em>

  • <em>Absolute </em><em>never give a negative</em><em> value</em>
  • <em>If the number </em><em>on the other side of the equation negative</em><em> then the </em><em>equation has no solution</em>

Let us solve the question

∵ Ix + 3I = -6

∵ The right side of the equation is negative

∵ Absolute never give a negative value

→ By using the 2nd note above

∴ The equation has NO solution

7 0
3 years ago
How do you do this problem??
ELEN [110]
It is a.
You multiply 9.3 and 2.5 together and get 23.25
Then just add the exponents 6+3 is 9
So the answer is 23.25 x 10^9
Hope this helps!!
7 0
3 years ago
Estimate the square root of 397 between two consecutive whole numbers.
marshall27 [118]

Answer: 19.9248588452

Step-by-step explanation:

5 0
3 years ago
7,676 rounded to the hundred
Tresset [83]
7,676 rounded to the nearest hundredth is: 7,700.

You are focusing on the 7676. If the 7 on the right of it has a number below five, then it would be 7600. On this hand, with it being more than 5, the correct answer is 7,700.
6 0
4 years ago
Read 2 more answers
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