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2 years ago

PLS HELPPP WHAT IS THE ANSWER???

Mathematics

1 answer:

Juliette [100K]2 years ago

6 0

Answer:

plug in the values and you get

-4

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Find the angle<br> 25 points for you plus a thanks, 5 star and brainliest

shutvik [7]

Answer:

43,81

Step-by-step explanation:

sin ? = 9/13

sin ?= 43,81

4 0

2 years ago

baherus [9]

Answer: see proof below

<u>Step-by-step explanation:</u>

Given: cos 330 = $\frac{\sqrt3}{2}$

Use the Double-Angle Identity: cos 2A = 2 cos² A - 1

$\text{Scratchwork:}\quad \bigg(\dfrac{\sqrt3 + 2}{2\sqrt2}\bigg)^2 = \dfrac{2\sqrt3 + 4}{8}$

Proof LHS → RHS:

LHS cos 165

Double-Angle: cos (2 · 165) = 2 cos² 165 - 1

⇒ cos 330 = 2 cos² 165 - 1

⇒ 2 cos² 165 = cos 330 + 1

Given: $2 \cos^2 165 = \dfrac{\sqrt3}{2} + 1$

$\rightarrow 2 \cos^2 165 = \dfrac{\sqrt3}{2} + \dfrac{2}{2}$

Divide by 2: $\cos^2 165 = \dfrac{\sqrt3+2}{4}$

$\rightarrow \cos^2 165 = \bigg(\dfrac{2}{2}\bigg)\dfrac{\sqrt3+2}{4}$

$\rightarrow \cos^2 165 = \dfrac{2\sqrt3+4}{8}$

Square root: $\sqrt{\cos^2 165} = \sqrt{\dfrac{4+2\sqrt3}{8}}$

Scratchwork: $\cos^2 165 = \bigg(\dfrac{\sqrt3+1}{2\sqrt2}\bigg)^2$

$\rightarrow \cos 165 = \pm \dfrac{\sqrt3+1}{2\sqrt2}$

Since cos 165 is in the 2nd Quadrant, the sign is NEGATIVE

$\rightarrow \cos 165 = - \dfrac{\sqrt3+1}{2\sqrt2}$

LHS = RHS $\checkmark$

4 0

3 years ago

A cylinder has a diameter of 14 ft and a height of 10 ft.

enyata [817]

The answer is 140 feet because 10×14 is 140

3 0

2 years ago

Read 2 more answers

Please help asap!!!!!!

Alex Ar [27]

A that's your answer

3 0

2 years ago

Wy.<br>e) The quotient of two numbers is equal to the sum of those numbers

frozen [14]

Answer:

"The quotient of two numbers is equal to the sum of the numbers" can be expressed by x/y = x + y, but the statement is false. You can't plug in any old x and y and expect the statement to be true. Just think of the equation y=10x+5.

Step-by-step explanation:

3 0

2 years ago