MHB Success: Solving #17 and #22 - A Guide

[missnerdist]

#17 View attachment 6889
#22 View attachment 6888

How do I do these?? Please help :((

EDIT: I got them all! thank you for all your help!

 

[skeeter]

#17 ...

note $\tan{\theta}=\dfrac{y}{x}$

#22 ...

Point P is on the negative y-axis ... the angle measured CCW from the positive x-axis to that part of the y-axis is $\dfrac{3\pi}{2}$, an angle whose cosine is zero.

fyi, the secant of an angle is the reciprocal of its cosine value.

edit ... looks like you've lengthened the laundry list.

 

[missnerdist]

#17 ...

note $\tan{\theta}=\dfrac{y}{x}$

#22 ...

Point P is on the negative y-axis ... the angle measured CCW from the positive x-axis to that part of the y-axis is $\dfrac{3\pi}{2}$, an angle whose cosine is zero.

fyi, the secant of an angle is the reciprocal of its cosine value.

edit ... looks like you've lengthened the laundry list.

I got #8! :D

- - - Updated - - -

#17 ...

note $\tan{\theta}=\dfrac{y}{x}$

#22 ...

Point P is on the negative y-axis ... the angle measured CCW from the positive x-axis to that part of the y-axis is $\dfrac{3\pi}{2}$, an angle whose cosine is zero.

fyi, the secant of an angle is the reciprocal of its cosine value.

edit ... looks like you've lengthened the laundry list.

For #17, I'm not too sure. At first I thought that the answer would be (-5,3), but it seems that it isn't the case.

 

[skeeter]

For #17, I'm not too sure. At first I thought that the answer would be (-5,3), but it seems that it isn't the case.

hint ... simplify a fraction

 

[missnerdist]

hint ... simplify a fraction

I got it! Thanks!