3 years ago

How did cos 2x become -cos 2x

1 answer:

Ksju [112]3 years ago

4 0

Cos2x = (cosx)^2-(sinx)^2 so if you have the minus before you have to inverse sign: (sinx)^2-(cosx)^2= -cos2x

You might be interested in

allsm [11]

The graph is a parabola with a vertex at -4

4 0

3 years ago

Aleks04 [339]

Answer:

187.5 m^3

Step-by-step explanation:

2 to 5 is 2(2.5)

2.5^2 = 6.25

6.25(30) = 187.5

6 0

2 years ago

aleksandrvk [35]

Answer:

all fractions containing integers are rational numbers is true I believe.

Step-by-step explanation:

8 0

2 years ago

kramer

Answer:

Step-by-step explanation:

270 degrees

5 0

3 years ago

Rina8888 [55]

Answer:

True

Step-by-step explanation:hi

6 0

3 years ago