2 years ago

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Mathematics

1 answer:

KIM [24]2 years ago

6 0

Answer:

The Red block is the answer

Step-by-step explanation:

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1) Simplify the following expressions: a) sin²108° + sin² 18°

abruzzese [7]

Note that

108° = 90° + 18°

sin(108°) = sin(90° + 18°) = sin(90°) cos(18°) + cos(90°) sin(18°) = cos(18°)

Then

sin²(108°) + sin²(18°) = cos²(18°) + sin²(18°) = 1

by the Pythagorean identity.

8 0

2 years ago

Help me PLEASEEEE<br> find the the angles

wel

You need to find x so that then you can do it and you didn’t share a answer so how are we supposed to know??

3 0

2 years ago

If u = 8 + 4i and v = 3i + 6, then what is u – v?

lozanna [386]

$u=8+4i\ and\ v=31+6\\\\u-v=(8+4i)-(3i+6)=8+4i-3i-6=(8-6)+(4i-3i)\\\\\huge\boxed{=2+i}\leftarrow \boxed{d}$

7 0

3 years ago

Help me pls I don’t know how to do this

rusak2 [61]

Answer:

$radius=6.68cm$

Step-by-step explanation:

Formula to find radius:

$r=\frac{C}{2\pi }$

$r=42/2\pi$

$r=42/2(3.14)$

$r=6.68cm$

<em>hope this helps......</em>

6 0

2 years ago

She starts at 37.

Anvisha [2.4K]

Answer:

B. 37 + 7 = 44

Step-by-step explanation:

If she jumps 4 more after jumping 3 to 40, means it's 4 + 3 = 7 and it reaches 44.

4 0

2 years ago

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