Question

prove that cos 1 - cos 2 × cos 3 ......... cos 180 =0
Quick!!❤​

Answer 1

Answer:

L.H.S.=cos1 cos2 cos3........cos180 =cos1 cos2 cos3...cos89. cos90. cos91.....cos180 =(cos1 cos2 cos3...cos89) cos90( cos91.....cos180) =(cos1 cos2 cos3...cos89)×0×( cos91.....cos180) (since cos90=0) =0 =R.H.S.Hence Proved.

Answer 2

cos 1- cos 2×cos3.....cos 180 = 0

we know that cos 90° = 0

then cos 2 × cos3.... cos 180 =

then cos 1- cos 2 cos 3 ... cos 180

= cos 1 = 0.9998

I think yr question is wrong

if yr question is

cos 1 cos 2 cos 3...... cos 180

then it is zero because cos 90 = 0

I hope my answer help you ❤️

otherwise report it.....