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3 years ago

Estimate the measure of ∠PQR to the nearest 10 degree

Mathematics

2 answers:

svp [43]3 years ago

7 0

I’d say 30 degrees. It is bent pretty far but not too far. If it was 40 you would tell because it would be a lot closer to a 45 degree angle

timurjin [86]3 years ago

4 0

Answer: i’m just guessing but id say 45°??

Step-by-step explanation:

bc it looks like half of 90° and half of 90 is 45

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zubka84 [21]

Answer:

See Explanation Below

Step-by-step explanation:

Given

$(sin x - cos x)^2 = sec^2x - tan^2x - 2sinx.cos x.$

Required

Prove

To start with; we open the bracket on the left hand side

$(sin x - cos x)^2 = (sin x - cos x)(sin x - cos x)$

$(sin x - cos x)^2 = (sin x )(sin x - cos x)- (cos x)(sin x - cos x)$

$(sin x - cos x)^2 = sin^2 x -sinx cos x - sin xcos x + cos^2 x$

$(sin x - cos x)^2 = sin^2 x -2sinx cos x + cos^2 x$

Reorder

$(sin x - cos x)^2 = sin^2 x + cos^2 x - 2sinx cos x$

From trigonometry;

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

So;

$(sin x - cos x)^2 = sin^2 x + cos^2 x - 2sinx cos x$

becomes

$(sin x - cos x)^2 = 1 - 2sinx cos x$

Also from trigonometry;

$sec^2x - tan^2x = 1$

So,

$(sin x - cos x)^2 = 1 - 2sinx cos x$

becomes

$(sin x - cos x)^2 = sec^2x - tan^2x - 2sinx cos x$

Proved

3 0

2 years ago

MR.Trek made some trail mix for his backpacking team. He used 2 1/2 cups of granola, 1 3/4 cups of peanuts, 1 1/3 cups of raisin

valentina_108 [34]

6 7/12 of trail mix . This is the answer

if you want me to explain then just comment back

6 0

3 years ago

A group of 10 friends ate dinner. They added a 15% tip, and it cost $99.50. What did the meal cost BEFORE the tip?

siniylev [52]

Cost of meal before tip is $86.52

4 0

3 years ago

Read 2 more answers

how to make a 89 inch snow man with a three balls of snow at the top piece 3 pieces 8 inches 3 inches and 7.09 inches now with a

oksano4ka [1.4K]

The answer is 112.09 i added 89+3+3+8+2=105+7.09=112.09

4 0

3 years ago

(Worth 30 points) What are the explicit equation and domain for an arithmetic sequence with a first term of 5 and a second term

kolbaska11 [484]

Answer:

$a_n=5-2(n-1)$ , all integers where n≥1

Step-by-step explanation:

we know that

The explicit equation for an arithmetic sequence is equal to

$a_n=a_1+d(n-1)$

a_n is the th term

a_1 is the first term

d is the common difference

n is the number of terms

we have

$a_1=5\\a_2=3$

Remember that

In an Arithmetic Sequence the difference between one term and the next is a constant, and this constant is called the common difference.

To find out the common difference subtract the first term from the second term

$d=a_2-a_1=3-5=-2$

substitute the given values in the formula

$a_n=5-2(n-1)$

The domain is all integers for $n\geq 1$

3 0

3 years ago