Jawab:
Penjelasan dengan langkah-langkah:
7.
cos 1/2 α = 0,6 = 3/5
sin ²1/2α = 1- cos²1/2α
= 1- (3/5)²
= 1- 9/25
= 16/25
sin 1/2α =√16/25 = 4/5
sin α = 2 sin 1/2α cos 1/2α
= 2. 4/5. 3/5
= 24/25
=0,96
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√5-√6(√5-√6)=√5+√6(√5-√6)
5-√30-√30+6= 5-√30+√30-6
11-√60=-1
11+1-√60
12-√4•15
12-2√15
10√15
maaf kalau salah
Jawab:
Penjelasan dengan langkah-langkah:
7.
cos 1/2 α = 0,6 = 3/5
sin ²1/2α = 1- cos²1/2α
= 1- (3/5)²
= 1- 9/25
= 16/25
sin 1/2α =√16/25 = 4/5
sin α = 2 sin 1/2α cos 1/2α
= 2. 4/5. 3/5
= 24/25
=0,96