Ml] //. I YA.S .i \y, .s/y;.u/./// y./viw 



.- 



2*-3f -t 7, 6f + - I - 



to the ymmelHcal form, and determine iu direction cosines. 

 9. Find the angle between the planes 



3,-* = 7, 6j+2t-l* 



10. Find the angle between the line 



-r+jr+2ssQ l 2x-jr-2s-l-o 

 3x + 6s-6f + 1 =0. 



11. Writ- the equation of a pUne parallel to the plant 



-y + 7-50, 



siid pejeiog through the point ((), U, o) ; through the point (-1, 1 . - 1 ). 



12. Write the equation of a plane perpendicular to the plane 



pawing through the two point* (3, 1. 2) and (0, -2. ~4). 



13. Kiu.l the dUtaneee of the potato (7, -2. 3) an from the 



/-s-9 = 0. Are they on the same side of the plane ? 



14. AtwhatangledoMtheplaiieax + Ay + es + ^sOcuteaehecwrdi- 

 nate plane? Each oobrdtnate axU? 



15. Kind the <*i a plane through the point (1, 1. 1) and 

 perpendicular to each of the planet 



16. Write the equation of a plane whoae distance from the point 

 . 1) is 3, and which U perpendicular to the radius rector of the 



poinr 1). 



17 Write the equation of a straight line through the potir 

 which is parallel to the line 



2x-3s + y-2 = 0, x + y + r + l=0. 



ia Find the traces on the coordinate planes of the line 

 2x-3s + y-2 = 0, x + jr + : + 1 Oi 



19. Prore thai the planet 



f 1 =<V 

 ^^-1=0, 



aix-f 3^ + 45-6 = 0, 

 have one line in common. 



