L
Table 73.1
Ordinates◦θVcosθVcosθsinθVsinθcos 2θVcos 2θsin 2θVsin 2θcos 3θVcos 3θsin 3θVsin 3θy^130620.86653.690.5310.5310.86653.6900162y^260350.517.50.86630.31−0.5−17.50.86630.31−1−3500y^390−38001−38−1380000−138y^4120−64−0.5320.866−55.42−0.532−0.86655.421−6400y^5150−63−0.86654.560.5−31.50.5−31.5−0.86654.56001−63y^6180−52−152001−5200−15200y^7210−28−0.86624.25−0.5140.5−140.866−24.2500−128y^824024−0.5−12−0.866−20.78−0.5−120.86620.7812400y^92708000−1−80−1−800000180y^10300960.548−0.866−83.14−0.5−48−0.866−83.14−1−9600y^11330900.86677.94−0.5−450.545−0.866−77.9400−1−90y^1236070170001700017000(^12) ∑ k=
1
yk
(212)
(^12) ∑ k=
1
yk
cos
θk
(^12) ∑ k=
1
yk
sin
θk
(^12) ∑ k=
1
yk
cos 2
θk
(^12) ∑ k=
1
yk
sin 2
θk
(^12) ∑ k=
1
yk
cos 3
θk
(^12) ∑ k=
1
yk
sin 3
θk
417
.^94
=−278.^53
=−39=29.^43
=−49=55