Maths... (1 Viewer)

[shaaali]

i know this is an unbelievably stupid question, but my mind has completely blanked of all trig i did last year.

how do you do this question?

find x to the nearest minute.

cos x° = 0.4792

how do you answer that question? i think you divide 0.4792 by cos right? but but...what do i type into my calculator?

(i cant believe ive forgotten all the simple things yet remember the not-so-simple things)

 

[watatank]

there's an inverse cos button on your calculator. cos and sin and tan etc aren't variables, they are function. the opposite of a cos function is an inverse cos function.

it looks like "cos^-1" so press that button than 0.4792 and you have ur answer (sorry dont have a calculatron handy )

hope that helps :wave:

 

[shaaali]

ohh okay thanks...

im hopeless with calculators and all these other new technologies out there. they just make my life more difficult.

 

[sle3pe3bumz]

mines shift cos 0.4792. but its probably cos its the old one which ive had since year 7

 

[cccclaire]

mines shift cos 0.4792. but its probably cos its the old one which ive had since year 7

yeh mines shift cos too.
I think most calculators are.

 

[Chelsea FC]

did u get 61 degrees and 22 minutes?

 

[blahmeh]

Typed number in wrong, can be so daft sometimes

61 degrees and 22 minutes

 

[sle3pe3bumz]

umm .. no, the answers what Chelsea FC got. 61° 22'

is your calculator on the right mode ? or maybe you typed in the number wrong ?

 

[watatank]

did u get 61 degrees and 22 minutes?

yeah that what i got.