Sects26 f v door99t e

28 g't 6 t46 fG x 1 so fG it70 f x 6 5ex fCx 6 5ex f x 5

Sec3.4zTf MI23 fCt It et t t et t Ett et28 fx e x 3 fEx Ex t e Ix Is x at3x29 g ztz daff kt 3zI I 25 t

34 sets t C4 I Hj t35 f't et E At2 etet 2 Iet76 fg ie f Nga tfarg'cm 34 52 22

IT Egjk ghf'H tmg 4 If ZgG

22.5 4.4

78 ft f x t Xf 5 FB t 3 13 31 32 9

79 cxthfxtxzyi.tk 46ft4yg fH 6tz 2

fSec3.512 Yingsinge uliano

53 si Et 5z substitute u 5x

25 deff e sinx e cos e osx siu x

34 dyq e.tt hnxtxqsx Csiux xsinxit cosxD

38 def 2tsinx o cosx ex2T sinx 2 t sin XJ

42 deff seex csdx

44 diff secxtanx tanx t secx sein secxtaixtsedxseex seEx tank

Note Using seix 1 tanx we canfurthersimplify toobtain

diff 2seek seex butyoushouldn'tworrytoomuchaboutthis I

47 If Ht scxcotxcotxatCscx

60 y EEcosx t te f sinx EE cosx Sinx

y EE eosx sinx t teCsinx cosx Esiax