Please help I will fan and medal!

- Unofficialllyy

Please help I will fan and medal!

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- katieb

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- Unofficialllyy

Find the measure of angle x. Round your answer to the nearest hundredth. (please type the numerical answer only)

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- Unofficialllyy

@welshfella Could you help?

- Unofficialllyy

I have this question and another just like it and then I am finished with my homework.

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## More answers

- welshfella

sin x = opposite side / hypotenuse = 8 / 17

- welshfella

SOH-CAH-TOA - have you heard of that memory aid?

- welshfella

calculate 8/17 then use ur calculator to find the value of angle x
enter sin-1 (value of x)

- welshfella

firrst use ur calculator to find 8/17 also!

- Unofficialllyy

So when I do 8/17 I get 0.47

- Unofficialllyy

Is that right?

- welshfella

more accurately its 0.4706

- Unofficialllyy

Then how do I do sin-1 on a calculator?

- welshfella

now thats the sine of x
so to find x you use the sin-1 function on your calculator

- welshfella

there should be a button for it - you probably have to press the shift key as well
- it must be a scientific calculator

- Unofficialllyy

0.4899?

- welshfella

no - x should be an angle between 20 and 30 degrees

- welshfella

have you got your calculator set to radians?

- Unofficialllyy

I'm not sure

- welshfella

because that would be the value of x in radians

- Unofficialllyy

I have a scientific calculator, but I don't know how to put in sin-1

- welshfella

is there a set up key on ur calc?

- Unofficialllyy

this is the exact calculator i have

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- welshfella

well you must have put sin-1 in correctly or you wouldn't have got 0.4899 which is exactly right in radians.

- welshfella

press SHIFT SIN-1 then 0.4706

- Unofficialllyy

28.07?

- welshfella

yes thats correct

- Unofficialllyy

And that would round up to 29, correct?

- welshfella

you need to press the mode button to change rad to deg right?

- Unofficialllyy

Yes I figured out how to do that

- Unofficialllyy

Find the measure of angle y. Round your answer to the nearest hundredth. (please type the numerical answer only)

##### 1 Attachment

- Unofficialllyy

This is my last one

- Unofficialllyy

Would the first one stay 28.07 or would it go up to 29 for my final answer?

- welshfella

no you need to round to the nearest 1 hundredth - that's 28.073 ---> 28. 07 the second place after the decimal pont is the hundreds
so the answer is 28.07 degrees

- Unofficialllyy

Okay :)

- welshfella

apply SOH-CAH-TOA
sin = opposite / hypotenuse
cos = adjacent / hypotenuse
tan = opposite / adjacent
opposite angle y is 5
adjacent to angle y = 14
so which trig ratio , sin cos or tan do we use?

- Unofficialllyy

Tangent

- welshfella

right!
so we have
tan y = 5/14
now you can find y in a similar way as for x in last problem
this time use tan-1 on ur calc

- Unofficialllyy

19.651?

- welshfella

5/14 = 0.35714
enter SHIFT Tan-1 0.35714

- welshfella

yes

- Unofficialllyy

Which would be 19.65

- welshfella

these are quite easy after you've practiced a few

- welshfella

yea

- Unofficialllyy

Yeah I think I will get the hang of them. Thank you so much, you were such a big help!

- welshfella

yw

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