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4 years ago

6

How do improve my math skills

1 answer:

raketka [301]4 years ago

5 0

Try to see if you can go to tutoring (if your school offers it) and take notes over what the teachers saying so you will remember later. every now and then you can use Photomath to solve a math problem and it tells you how to solve it so you can learn. good luck!❤️

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If cosA = 3/5 and A ∈ (630,720), find sin2A

Sergio039 [100]

Answer:

- $\frac{24}{25}$

Step-by-step explanation:

Given 630 < A > 720 then A is in the fourth quadrant where

cosA > 0 and sinA < 0

Given

cosA = $\frac{3}{5}$ = $\frac{adjacent}{hypotenuse}$

Then the triangle is a 3- 4 - 5 with opposite side 4, thus

sinA = - $\frac{opposite}{hypotenuse}$ = - $\frac{4}{5}$

Using the trigonometric identity

sin2A = 2sinAcosA

= 2 × - $\frac{4}{5}$ × $\frac{3}{5}$

= $\frac{2(-4)(3)}{5(5)}$ = - $\frac{24}{25}$

5 0

3 years ago

Which expression is equivalent to 144^3/2?

ira [324]

we are given

$(144)^{\frac{3}{2} }$

we can write it as

$144=12 \times 12$

$144=12^2$

we can replace it as

$(144)^{\frac{3}{2} }=(12^2)^{\frac{3}{2} }$

$(144)^{\frac{3}{2} }=(12)^{2*\frac{3}{2} }$

$(144)^{\frac{3}{2} }=(12)^{3 }$

$(144)^{\frac{3}{2} }=1728$ ...............Answer

5 0

3 years ago

Read 2 more answers

Need this answered ASAP

Fudgin [204]

i think is 3rd one, cuz in the app photomath it said (-1, -9)

so this might be close

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3 years ago

List from least to greatest<br> 4.1, 0.25, 0.042, 2.21

jolli1 [7]

Answer:

4.1, 2.21, 0.25,0.042

Step-by-step explanation:

you have to add a 0 onto the first one because it will bring it to be equal to most of the others

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3 years ago

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Find the surface area of the triangular prism shown below.

storchak [24]

Answer:

150

Step-by-step explanation:

mark brainliest plz

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3 years ago