3 years ago

Need help fast ! And need info

Mathematics

1 answer:

Alona [7]3 years ago

8 0

Answer:

calulate the mean

Step-by-step explanation:

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What basic trigonometric identity would you use to verify that sinx cosx tanx=1-cos^2x

andre [41]

Answer:

$sin^2x+cos^2x=1$ is used to prove the given equation.

Step-by-step explanation:

We have given an equation:

$sinx\cdot cosx\cdot tanx=1-cos^2x$

We will consider right hand side first

tan x can be written as:

$tanx=\frac{sinx}{cosx}$

So, on substituting tan x in the left hand side of the given equation we get:

$sinx\cdot cosx\cdot \frac{sinx}{cosx}$

Cancel common term from denominator and numerator which is cosx we get

$sin^2x$

And we have an identity:

$sin^2x+cos^2x=1$

$\Rightarrow sin^2x=1-cos^2x$

Hence, right hand side is equal to $sin^2x$ .

5 0

3 years ago

Read 2 more answers

Which expression is equivalent to:

Mashcka [7]

Answer:

It's 3 (a + 11)

Step-by-step explanation:

I don't know if you said that the 3 was a negative but if you did then don't choose my answer.

4 0

3 years ago

Read 2 more answers

1. Look for a pattern in the first three equations. Then, fill in the missing numbers in the rest of the

Alla [95]

Answer:

1=1 times 2/2 1 + 2=2 times 3/2 1 +2+3=3 times 4/2 1+2+3+4=4 times 5/2 1+2+3+4+5=5 times 6/2

4 0

3 years ago

How do you solve a/7+5/7=2/7

Anton [14]

$\frac{a}{7} + \frac{5}{7} = \frac{2}{7} \\ \frac{a + 5}{7} = \frac{2}{7} \\ 7(\frac{a + 5}{7}) = 7(\frac{2}{7})$
a + 5 = 2
a + 5 - 5 = 2 - 5
a = -3

Hope this helps! :)

4 0

4 years ago

The question is in the picture. PLEASE HELP!!!! Thank you!!!;);)

fomenos

Answer:

19/9

Step-by-step explanation:

16/27^2/3=19/9

hope this is helpful! brainly deleted my last response for some reason

8 0

3 years ago