3 years ago

Q6 Q19.) Write the expression as the sine, cosine, or tangent of an angle. Then find the exact value of the expression.

Mathematics

1 answer:

Greeley [361]3 years ago

3 0

Using sin(A+B) = sinAcosB + cosAsinB

sin20cos40 + cos20sin40 = sin(20+40) = sin60degree

= $\frac{ \sqrt{3}}{ 2}$

You might be interested in

Ashley has finished 7/25 of her homework what percentage of the homework does Ashley still need to finish

ludmilkaskok [199]

Answer:

72 percent

Step-by-step explanation:

7/25, x 4 to get a fraction of 100

28/100

100 - 28 = 72

72 percent

3 0

1 year ago

Read 2 more answers

Help!! this is due Friday and I forgot how to do math

Hatshy [7]

I pretty sure it is A I looked it up.

5 0

2 years ago

Read 2 more answers

Light from the sun can travel a million miles in 5.368 second how many seconds is that rounded to the nearest tenth of a second

weqwewe [10]

5.4 rounded to the nearest tenth of a second

3 0

2 years ago

Read 2 more answers

A random sample of 7 fields of durum wheat has a mean yield of 29.8 bushels per acre and standard deviation of 3.62 bushels per

meriva

Answer:

CI = 29.8 ± 3.53

Critical value is z = 2.58

Step-by-step explanation:

First of all let's find margin of error. It is given by the formula;

ME = zσ/√n

We are given;

Standard deviation; σ = 3.62

Sample size; n = 7

Mean; x¯ = 29.8

Now, z-value for 99% Confidence level is 2.58

Thus;

ME = (2.58 × 3.62)/√7

ME = 3.53

CI is written as;

CI = x¯ ± ME

CI = 29.8 ± 3.53

Critical value is z = 2.58

5 0

2 years ago

If A = 41 degree, <br> Angle BDC = 58 degree, <br> and y = 8, Find x.

love history [14]

Check the pictures below.

make sure your calculator is in Degree mode, since the angles are in degrees.

4 0

3 years ago

Q6 Q19.) Write the expression as the​ sine, cosine, or tangent of an angle. Then find the exact value of the expression.

Q6 Q19.) Write the expression as the sine, cosine, or tangent of an angle. Then find the exact value of the expression.