101 Movies to See Before You Grow Up: Be your own movie critic--the must-see movie list for ki

101 Movies to See Before You Grow Up: Be your own movie critic--the must-see movie list for ki

Matematika Sekolah Menengah Atas nilai selisih sudut cos 15 ?​

nilai selisih sudut cos 15 ?​

Penjelasan dengan langkah-langkah:

selisih sudut cos 15

= cos (45°-30°)

= cos 45 cos 30 + sin 45 sin 30

cos 45= 3/2

cos 30= 3/2

sin 45= 2/2

sin 30= 1/2

maka cos (45°-30°)

= 2/2×3/2 + 2/2 × 1/2

= (6+2)/4

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