Question

sec sin^-1(- 1/4)

use a sketch to find the cxact value of the follwing expression. help plesssssss

Answer 1

i need to know the correct formula for the function can u repeat it ?

Answer 2

I dont know what formula I have to use

Answer 3

i ment the qs this is "sec sin^-1(- 1/4)" right ??

Answer 4

correct

Answer 5

??

Answer 6

ok u can write it like this
y=sec sin^-1(- 1/4) = sec (1/sin (-1/4)
now since there is no such variable x.. its constant function .
need to now sin(-1/4)=-0.247 "from calculater"
so y= sec(1/-0.247)=-1.623 "from calculater"
now u have y=-1.623 drow it

Answer 7

so what do u think the answer is ?

Answer 8

lol its "-1.623 "
but there is another way to get the answer ready ??

Answer 9

cause I have to write only the final answer that is all what they need

Answer 10

For the sin of an angle to be 1/4, that means the opposite side is 1, and the hypotenuse is 4
so the adjacent side is √(4² - 1² ) = √(15)
that means the cosine is √(15)/4
so the secant is ± 4/√(15), depending on if the angle is in Q3 or Q4

Answer 11

is that right or wrong ?

Answer 12

yes its the ansewr , although i think the qs a bet waired usually its written
like this sec (- 1/4) sin^-1(- 1/4) thats y a asked u first a bout the formula if its correct

Answer 13

it is sec(sin-1/4

Answer 14

ok now i got u sin^-1 means the invers fun not 1/sin .

Answer 15

okay ?

Answer 16

its negative

Answer 17

well the sin is allways positive on first & second quarter
so sin(-1/4)=sin(1/4)

Answer 18

oh okay , so the answer is !!

Answer 19

huh , u typed it lol !!! i was checking my knowlege.

Answer 20

I have 10 more minuts I realy need the right final answer ples

Answer 21

i told u , that u got it , but its positive \[4/\sqrt{15}\]