*** i have been stuck on these 3 questions for 4 days*

Remark

There's a lot of points in this question. I'll try and give you complete answers.

"Page" One

Cos(42) = 0.7431

Most modern Calculators are answered this way.

Cos

42

=

And it should give you the answer I gave.

Question Two

Sin(42) = 2/3

There are 2 ways to find the cos(48).

1.

Just put it in your calculator. It gives you the same answer so cos(48) = 2/3

2.

The second way is to know that the sine of an angle and it's complement are equal. 0.66 is approximately equal to 2/3

Question 3

the same thing is true for tangents sort of.

Tan(20.5) = 1/tan(90 - 20.5)

Tan(20.5) = 1/tan(69.5) Let's see if that's right.

Tan(20.5) = 0.384 which is pretty close to 3/8

3/8 = 0.375

1/tan(69.5) = 0.374 same as above.

You would put this into your calculator as

1

divide

tan

69.5

=

So what you are intended to answer is Tan(69.5) = 8/3

"Page" Two

<A = 90 You just read that one. No calculator needed.

the easiest way to solve for angle B is to use the cos-1 of B

Cos(B) = adjacent / hypotenuse

Cos(B) = 14/32

The way you put this into your calculator is

2nd F [usually an orangy/yellow button]

cos-1

(

14

divide

32

)

=

Which should give you 64.06 degrees which must be rounded to the nearest degree = 64 degrees. Answer 1

Now the answer to the last angle = 180 - 90 - 64 = 26 degrees. Answer 2

"Page" Three

problem one

Make sure you use Cos-1

Cos-1(0.1045) = 84 degrees I'm being a little scant in my answer. you need to look back to find cos-1.

Problem two

Opposite = 93 meters (she's an awfully tall lady).

Angle = 26.3 degrees.

adjacent =

Tan(26.3) = opposite / adjacent

0.4942 = 93 / adjacent. Multiply both sides by adjacent

0.4942 * adjacent = 93 Divide by 0,4942

adjacent = 93/0.4942

adjacent = 188.2 meters away.

Concluding Comment

This is very long. Be patient with it. You'll learn quite a bit including when to round.

45

step-by-step explanation:

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.