Question

Apabila sin α + sin β = 2 dan cos 1/2 ( α-β ) = 2 maka nilai dari sin 1/2 ( α-β ) adalah.....

Answer 1

Verified answer

Jawab
untuk  sin 1/2 (a +b)=....

sin a + sin b = 2
2  {sin 1/2 (a + b)} {cos 1/2 (a - b)} = 2
(2 ) {sin 1/2 (a +b)}  ( 2)  = 2
4 sin 1/2 (a + b) = 2
sin 1/2 (a + b) = 1/2

Answer 2

Verified answer

TriGonoMetRi

sin a + sin b = 2
2 sin (a+b)/2 cos (a-b)/2 = 2
sin 1/2 (a+b) . cos 1/2 (a-b) = 1
sin 1/2 (a+b) = 1/(cos 1/2 (a-b))
sin 1/2 (a+b) = 1/2