1)Find the tan, and cot of
270° 13' 37''
Can I do it using tables? or should I use calculator
2)Express cot 138° 15' 10'' as the same function of a positive acute angle
Thanks
2007-03-01 02:43:09 · 2 answers · asked by PC 1 in Science & Mathematics ➔ Mathematics
I want the exact value. In the table minutes are not given. I know to convert that into degrees .but that will not work with tables.
2007-03-01 03:04:53 · update #1
Convert it to decimals and use a calculator
60''=1'
37''=37/60=0.617 ' ( At one point you must round up)
13.617' are 13.617/60 deg=0.227 deg So you have 270.227 deg
tan = -2.525*10^2 and cot = -0.0040
2) = -cot48*15'10''
2007-03-01 05:14:44 · answer #1 · answered by santmann2002 7 · 0⤊ 0⤋
1) ask your teacher about what is allowed!
This is very close to 270° = 3pi/2 so you should be able to approximate it.
2) This is in the second quadrant. The corresponding angle in the first quadrant is 180 - 138° 15' 10'' = 41°44'50". The sine will change signs so the cotg will also.
Answer: - cot 41°44'50".
2007-03-01 10:50:49 · answer #2 · answered by Anonymous · 0⤊ 0⤋