Question

What is the value of sin x°?

12 ÷ 13

13 ÷ 5

13 ÷ 12

5 ÷ 13

Answer 1

@paki can you help please :)

Answer 2

\[\sin(x) = \frac{Perpendicular}{Hypotenuse}\]

In your diagram, Side opposite to angle x is Perpendicular and bigger length line is Hypotenuse.

Just put in the values there.. :)

Answer 3

@waterineyes so I got 5/13?

Answer 4

That's nice.. :)

Answer 5

@waterineyes can you help me with another one?

Answer 6

Sure just post it..

Answer 7

What is the distance BC between the two horizontal parallel bars?
4 by cos 45 degrees

4 sin 45°

4 by tan 45 degrees

4 tan 45°

Answer 8

@waterineyes I got 4 tan 45 deg. ? Its that I dont really understand this...

Answer 9

Wait, we should go with finding tan(45) here..

Answer 10

\[\tan(45) = \frac{Perpendicular}{Base}\]

Answer 11

am i right?

Answer 12

Let me see it..

Answer 13

4 tan 45 deg

Answer 14

Yes, Good...:)

Answer 15

okay

Answer 16

You are doing well.. Keep it up.. :)

Answer 17

Use the image below to answer the following question.
What relationship do the ratios of sin x° and cos y° share?
The ratios are both identical (3 over 5 and 3 over 5).

The ratios are opposites (negative 3 over 5 and 3 over 5).

The ratios are reciprocals (3 over 5 and 5 over 3).

The ratios are both negative (negative 5 over 3 and negative 3 over 5).

Answer 18

@waterineyes

Answer 19

Tell me what have you got??

Answer 20

I think its The ratios are both identical (3 over 5 and 3 over 5), but i dont even understand how i got that;/

Answer 21

@waterineyes

Answer 22

Yes you are right..

Answer 23

Your perpendicular and base depend on which angle you choose..

If you are choosing angle x like sin(x), then perpendicular will be its opposite side that is side with length 3..

But if you are choosing y as your angle like in cos(y), here side opposite to angle y will be your perpendicular which is, in this case, side with length 4.. :)

Answer 24

@waterineyes Oh thanks:)

Answer 25

Hypotenuse remains same..

Perpendicular and Base depend upon the angle you are choosing.. :)

Answer 26

For angle x, 3 is perpendicular and 4 is base..

For angle y, 4 is perpendicular and 3 is base..

Hypotenuse remains same in both cases ie 5..

Answer 27

@waterineyes The length of the shadow of a building is 120 meters, as shown below:

The shadow of a building is 120 meters long. The acute angle that the shadow makes with the line joining the tip of the building to the end of the shadow measures 60 degrees.

What is the height of the building?

325.24 m

240 m

120 m

207.84 m

Answer 28

Use tan of angle to find the height.. :)

Answer 29

@waterineyes I did tan60=AC/BC

1.732=AC/120

AC=1.732*120
and got 207.84m?

Answer 30

Yeah that is right.. :) Well Done.. )