tolong bantuin guys!!!
Jawaban:
A.1
Penjelasan dengan langkah-langkah:
[tex] \sf \sin( {30}^{o} ) = \frac{1}{2} \\ \sf \cos( {60}^{o} ) = \frac{1}{2} \\ \sf \cos( {30}^{o} ) = \frac{ \sqrt{3} }{2} \\ \sf \sin( {60}^{o} ) = \frac{ \sqrt{3} }{2} \\ \\ \frac{1}{2} \times \frac{1}{2} + \frac{ \sqrt{3} }{2} \times \frac{ \sqrt{3} }{2} \\ \\ = \frac{1 \times 1}{2 \times 2} + \frac{ \sqrt{3} \sqrt{3} }{2 \times 2} \\ \\ = \frac{1}{4} + \frac{3}{4} \\ \\ = \frac{ 1 + 3}{4} \\ \\ = \frac{4}{4} \\ \\ = 1[/tex]
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