Tolong dongg cos 10° / (cos 40°.cos50°) adalaah? plisss banget pake caranyaaa
arsetpopeye
Cos 10° /(cos 40° cos 50°) = cos 10° / (1/2 cos (40° + 50°) + 1/2 cos (40° - 50°)) = cos 10° / (1/2 cos 90° + 1/2 cos (-10°)) = cos 10° / (1/2 . 0 + 1/2 cos 10°) = cos 10° / (1/2 cos 10°) = 1/(1/2) = 2
= cos 10° / (1/2 cos (40° + 50°) + 1/2 cos (40° - 50°))
= cos 10° / (1/2 cos 90° + 1/2 cos (-10°))
= cos 10° / (1/2 . 0 + 1/2 cos 10°)
= cos 10° / (1/2 cos 10°)
= 1/(1/2)
= 2