3 years ago

In a right triangle that has one acute angle of 18 degrees, cos 18 degrees is congruent to ?

Mathematics

1 answer:

vichka [17]3 years ago

3 0

Answer:

cos(18°)=sin(72°)

Step-by-step explanation:

we know that

In a right triangle

cos(A)=sin(B)

If A and B are complementary angles

A+B=90°

In this problem

A=18°

B=90-18=72°

therefore

cos(18°)=sin(72°)

You might be interested in

It is believed that 43% of the US population can play the piano, 28% can play the guitar, 15% can play the harmonica, 12% can pl

melomori [17]

Answer:

The smallest sample size to satisfy the conditions is n=500.

Step-by-step explanation:

The condition for performing the inference related to the sample size is that, for all the categories, the expected success and failures in the sample are at least 10:

$np\geq10\\\\n(1-p)\geq10$

The largest sample size required will be for the minimum p or (1-p).

This happens to be the proportion that can play other instruments: 2%.

Then, we can calculate the minimum sample size as:

$np\geq10\\\\n(0.02)\geq10\\\\n\geq(10/0.02)\\\\n\geq500$

6 0

3 years ago

The coordinates of point Y is (-10,5). The midpoint of XY is (3,-5). Find the coordinates of point X

serg [7]

Answer:

the way its set up its kind of confusing ↑

Step-by-step explanation:

4 0

3 years ago

The beeville city council surveyed 500 beeville citizens. of those surveyed, 350 citizens named summer as their favorite season.

lara31 [8.8K]

The correct answer is C. or B. I think so if you get it wrong plz don't get mad at me i WARNED YOU.

6 0

4 years ago

Find three consecutive odd integers where the sum of the first two numbers multiplied by the last number is 3116.

skad [1K]

B I think cause I tried them all

6 0

3 years ago

X^2+6x-19=0 pls helpppp

USPshnik [31]

Answer:

Step-by-step explanation:

Since this is not factorable, let's just complete the square:

$x^2+6x=19\\x^2+6x+9=28\\(x+3)^2=28\\x+3=\sqrt{28}\\x=2\sqrt{7}-3$

8 0

3 years ago