Thread: need help very urgent

can show mi the step...thanx

if sin x=-0.6 and tan x = -0.75,then sec x is

1)-1.25
2)1.25
3)0.80
4)-1.35

Originally Posted by cheesepie

can show mi the step...thanx

if sin x=-0.6 and tan x = -0.75,then sec x is

1)-1.25
2)1.25
3)0.80
4)-1.35

Hello,

1. You know that and

so



Therefore:

Thus the answer is 2)

Greetings

EB

Originally Posted by cheesepie

can show mi the step...thanx

if sin x=-0.6 and tan x = -0.75,then sec x is

1)-1.25
2)1.25
3)0.80
4)-1.35

,

so:



RonL

Originally Posted by CaptainBlack

,

so:



RonL

Hello,

I'm a little bit confused, because I read a sin x = -0.6 in the problem of cheesepie.

Greetings

EB

can u show mi the step of this question ? thanx

if cos x=0.6 and tan x is negative ,then csc x is


1)1.25
2)-1.25
3)0.80
4)0.75

Originally Posted by earboth

Hello,

I'm a little bit confused, because I read a sin x = -0.6 in the problem of cheesepie.

Greetings

EB

Sorry I misread the value

RonL

Originally Posted by cheesepie

can u show mi the step of this question ? thanx
if cos x=0.6 and tan x is negative ,then csc x is
1)1.25
2)-1.25
3)0.80
4)0.75

Hello,

This problem is a tricky one, because you didn't give a value for tan(x). To be able to calculate a value I take the value from the previous problem: tan(x)=-.75

1. You know that and

and So you get:

= = =

This answer doesn't exist. So I presume, that my asumption about the value of tan(x) was incorrect. But maybe you can use my explanations when you plug in the right value for tan(x).

Greetings

EB

Originally Posted by cheesepie

can u show mi the step of this question ? thanx

if cos x=0.6 and tan x is negative ,then csc x is


1)1.25
2)-1.25
3)0.80
4)0.75

We know that cos x = 0.6
Thus:

Since tan x is negative, sin x = -0.8

Thus csc x = 1/sin x = 1/-0.8 = -1.25

-Dan