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3 years ago

Cos square 30 degree minus sin square 30 degree is equals to 1 minus 2 sin square 30 degree

Mathematics

1 answer:

babunello [35]3 years ago

4 0

Answer:

see explanation

Step-by-step explanation:

Not sure quite what you are asking, but

Using the trigonometric identity

cos² x = 1 - sin²x, then

cos²x - sin²x

= 1 - sin²x - sin²x

= 1 - 2sin²x

Thus

cos²30° - sin²30° = 1 - 2sin²30°

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X (dy/dx) = (y-1/y+1)-y

notsponge [240]

F' $( \frac{y-1}{y+1})-y$ =
f' $( \frac{y-1}{y+1})$ -f'(y) [/tex]=
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$\frac{(f'(y)-f'(1))(y+1)-(f'(y)+f'(1))(y-1)}{(y+1)^2} -1$ =
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2 years ago

La altura de un triángulo equilátero cuyo perimetro mide 45 cm ?

OLga [1]

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3 years ago

Lexie is making a scale drawing of a soccer field that is 120 yards long and 80 yards wide. If the field in Lexie’s drawing is 3

timurjin [86]

Answer:

The field in Lexie's drawing should be 20 cm long.

Explanation:

Making a scale drawing requires that the figure be similar, which implies that the sides of the figures be proportional.

The proportion for a drawing 30 cm wide and unknown length with the soccer field that is 120 yards long and 80 yards wide is:

length of the drawing / width of the drawing = length of the field / width of the field

Thus, using x for the unknown width of the drawing:

30 cm / x = 120 yard / 80 yard

Thus, you must solve for x:

30 cm × 80 yard = 120 yard × x

x = 30 cm × 80 yard / 120 yard = 20 cm.

Hence, the field in Lexie's drawing should be 20 cm long.

4 0

3 years ago

Shawn made a scale drawing of a house and its lot. The scale he used was 13 inches = 5 feet. The backyard is 104 inches in the d

NemiM [27]

13 inches = 5 feet

----------------------------
Find 1 inch:
----------------------------
1 inch = 5/13 feet

----------------------------
Find 104 inches:
----------------------------
104 inches = 5/13 x 104 feet
104 inches = 40 feet

--------------------------------------------------------
Answer: 40 feet
--------------------------------------------------------

6 0

3 years ago

Find the x-intercept and y-intercept of the line. 3x + y = 6

Dafna1 [17]

Answer:

x = (6 - y)÷ 3

Step-by-step explanation:

3x + y = 6

3x = 6 - y

x = 6 - y ÷ 3

6 0

2 years ago

Cos square 30 degree minus sin square 30 degree is equals to 1 minus 2 sin square 30 degree​

Cos square 30 degree minus sin square 30 degree is equals to 1 minus 2 sin square 30 degree