3 years ago

PLEASE HELP ME!!!

Mathematics

1 answer:

slamgirl [31]3 years ago

7 0

Answer:

Step-by-step explanation:

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Talja [164]

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3 years ago

<img src="https://tex.z-dn.net/?f=%28%20%5Csin%5E%7B2%7D%20%28%20%5Cfrac%7B%5Cpi%7D%7B%204%20%7D%20%20-%20%20%5Calpha%20%29%20%2

guapka [62]

Step-by-step explanation:

$\sin^2 (\frac{\pi}{4} - \alpha) = \frac{1}{2}(1 - \sin 2\alpha)$

Use the identity

$\sin^2 \theta = \dfrac{1 - \cos 2\theta}{2}$

on the left side.

$\dfrac{1 - \cos [2(\frac{\pi}{4} - \alpha)]}{2} = \frac{1}{2}(1 - \sin 2\alpha)$

$\dfrac{1 - \cos (\frac{\pi}{2} - 2\alpha)}{2} = \frac{1}{2}(1 - \sin 2\alpha)$

Now use the identity

$\sin \theta = \cos(\frac{\pi}{2} - \theta)$

on the left side.

$\dfrac{1 - \sin 2\alpha}{2} = \frac{1}{2}(1 - \sin 2\alpha)$

$\frac{1}{2}(1 - \sin 2\alpha) = \frac{1}{2}(1 - \sin 2\alpha)$

4 0

2 years ago

Which expression is equivalent to -32^3/5?

Sunny_sXe [5.5K]

Answer:

the first one

Step-by-step explanation:

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2 years ago

Show that <1+<2+<3=180, if line l and m are parallels cut by two transversals.

Svet_ta [14]

Step-by-step explanation:

Angle 1 2 and 3 are angles that are in a triangle and all the angles in a triangle always add up to 180

so <1 +<2 +<3=180

Hope that helps :)

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3 years ago

2c+6= 30<br> work out the value of c

Dafna1 [17]

Answer:

2c + 6 = 30

2c = 24

c = 12

8 0

2 years ago

Read 2 more answers