3 years ago

: Đẳng thức nào sau đây đúng ? A. cos4x – sin4x = 2-cos2x B. cos4x – sin4x = 1+2sin2x

Mathematics

1 answer:

Mazyrski [523]3 years ago

3 0

Step-by-step explanation:

A. cos4x-sin4x=2-cos2x

You might be interested in

X/3 + 4<6 pls help will mark branliest

Agata [3.3K]

Answer:

x < 6

Step-by-step explanation:

$\frac{x}{3}+4 < 6$

Subtract 4 form both sides

$\frac{x}{3}$

Multiply both sides by 3

$x < 2*3\\\\x < 6$

3 0

3 years ago

Read 2 more answers

Find each percent increase or decrease to the nearest percent:

Svet_ta [14]

From 10 to 15 -> 10 increased with half its size (5), that means increase of 50%
From 16 to 12 -> decrease of 4, which is a quarter of 16, that means a decrease of 25%

4 0

3 years ago

Kristan gets home from work at 5:34 p.m.kristan dinner is ready at 5:51pm .How many seconds after kristan gets home is her dinne

sergejj [24]

Answer:1,020

Step-by-step explanation:

6 0

3 years ago

Iris is sewing fringe around the edges of a square tablecloth. Each side of the tablecloth is 36 inches long. How many inches of

Anna71 [15]

Answer:

if she is sewing fringe around a square table cloth, you know that a square has 4 sides, and if each of those 4 sides is 36 inches long, you would take 36 × 4, which would equal 144, i hope this helps

7 0

3 years ago

The angle measure of a triangle is shown in the diagram.

zalisa [80]

Answer:

i dont know

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers