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3 years ago

What are the answers?

Mathematics

1 answer:

madam [21]3 years ago

7 0

Positive numbers is the last one

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Can someone help me?

andreyandreev [35.5K]

I’m sorry I can’t see it well enough (my eyesight is bad)

4 0

2 years ago

Set up the equations to determine s and t.

Viefleur [7K]

Answer:

t° = 11° s°= 71°

Step-by-step explanation:

79° + t° =90° (Given)

t°= 90° - 79°

t°= 11°

s°+79°+11°+19° =180° (angles on an str line)

s° = 180° - 109°

s° = 71°

5 0

3 years ago

Find the exact value

ivann1987 [24]

Answer:

Step-by-step explanation:

$cos~ \theta=\sqrt{1-sin^2 \theta} =\sqrt{1-(\frac{1}{2})^2 } =\frac{\sqrt{3} }{2} \\1+cos~\theta=2cos^2\frac{\theta}{2} \\1+\frac{\sqrt{3}}{2} =2~cos^2 \frac{\theta}{2} \\cos^2\frac{\theta}{2} =\frac{2+\sqrt{3}}{2 \times 2} \\cos \frac{\theta}{2} =\frac{\sqrt{2+\sqrt{3}}}{2} \\1-cos \theta=2 ~sin^2\frac{\theta}{2} \\1-\frac{\sqrt{3}}{2}=2~sin^2 \frac{\theta}{2} \\sin^2 \frac{\theta}{2} =\frac{2-\sqrt{3} }{2 \times 2} \\sin \frac{\theta}{2}=\frac{\sqrt{2-\sqrt{3} } }{2}$

as 0≤θ≤90

so θ/2 is also in 0≤θ≤90

hence sin θ/2 and cos θ/2 are positive.

3 0

2 years ago

Someone help?! Brainliest and points!!!

Tamiku [17]

the answer is C.

:) I hope its right

6 0

3 years ago

Read 2 more answers

Simply. (-5.12) - (-4.7) + (7.021)

Degger [83]

<em>Simplify brackets </em>

-5.12 + 4.7 + 7.021

<em>Simplify </em>

6.601

Answer: B 6.601

4 0

3 years ago