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Dominik [7]
2 years ago
6

Tìm giá trị lớn nhất giá trị nhỏ nhất Cos(x+π/3)+ cos(x-π/3)

Mathematics
1 answer:
Elina [12.6K]2 years ago
6 0

Answer:

GTLN : 1  GTNN: -1

Step-by-step explanation:

Ta có:

y=cos(x+\frac{\pi }{3} ) + cos(x-\frac{\pi }{3} ) \\  = 2.cosx.cos\frac{\pi }{3}  \\  = cosx

mà -1\leq cosx \leq 1

Nên Max y=1  , x ∈ R

       Min y = -1, x ∈ R

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SOMEONE PLEASE HELP ME WITH THIS!!<br> IMAGE DOWN BELOW!!<br> ILL GIVE YOU BRAINLIST ANSWER!!
larisa [96]

Answer:

7.235 cm

Step-by-step explanation:

Pythagorean theory

A^2 + B^2 = C^2

A = 4.7

B = 5.5

4.7^2 + 5.5^2 = C^2

22.09 + 30.25 = C^2

√52.34 = √C^2

7.235 cm ≈ C

3 0
2 years ago
Marcus, nan, and olivia each have $1.65 in their pockets.they decide to combine the money.how much money do they have altogether
Reil [10]
1.65
1.65
1.65

4.95

all together they have that much :). I hope this helped!
3 0
3 years ago
What is the area of the shaded region? (Use 3.14 for Pi) *
love history [14]

Answer:

The area of the shaded region is the difference between the areas of the rectangle and the square.

Step-by-step explanation:

8 0
3 years ago
angle A is a compliment of angle b and m angle b = (6-5x) degrees and m angle a =(7-2x)degrees find m angle a
Anuta_ua [19.1K]

Answer:

61

Step-by-step explanation:

A + B = 90

6 - 5x + 7 - 2x = 90

13 - 7x = 90

- 7x = 90 - 13

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- x = 77 / 7

x = - 11

A: 6 - (5 * - 11) = 6 + 55 = 61

B: 7 - (2 * -11)  = 7 + 22 = 29

Together they equal 90 as they should.

7 0
3 years ago
Pint-Sized Portraits has 4 different backgrounds and 5 poses in which to photograph children. How many different pictures are th
mestny [16]
Your answer is: 20

They have 4 different backgrounds and 5 different poses which means you just have to multiply the 4 backgrounds*the 5 different poses to discover how many different pictures you could have at the most.

hope this helps!
4 0
3 years ago
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