perhatikan setiap gambar berikut. kemudian, tentukan nilai sin a, cos a, tan a, cosec a, sec a, dan cotan a pada setiap gambar berikut.

<p>&nbsp;Jawaban : sin a = 3/5, cos a = 4/5, tan a = 3/4, cosec a = 5/3, sec a = 5/4, dan cotan a = 4/3</p><p>&nbsp;</p><p>Ingat!&nbsp;</p><p>Perbandingan trigonometri:&nbsp;</p><p>sin a = de/mi&nbsp;</p><p>cos a = sa/mi&nbsp;</p><p>tan a = de/sa&nbsp;</p><p>cosec a = mi/de</p><p>sec a = mi/sa</p><p>cotan a = sa/de</p><p>dengan de = √(mi²-sa²)&nbsp;</p><p>de : sisi depan sudut a</p><p>sa : sisi samping sudut a</p><p>mi : sisi miring&nbsp;</p><p>&nbsp;</p><p>Diketahui mi = 15</p><p>sa = 12</p><p>&nbsp;</p><p>de = √(mi²-sa²)&nbsp;</p><p>de = √(15²-12²)&nbsp;</p><p>de = √(225-144)&nbsp;</p><p>de = √(81)&nbsp;</p><p>de = 9</p><p>&nbsp;</p><p>Sehingga</p><p>sin a = de/mi = 9/15 = 3/5</p><p>cos a = sa/mi = 12/15 = 4/5</p><p>tan a = de/sa = 9/12 = 3/4</p><p>cosec a = mi/de = 15/9 = 5/3</p><p>sec a = mi/sa = 15/12 = 5/4</p><p>cotan a = sa/de = 12/9 = 4/3</p><p>&nbsp;</p><p>Jadi, sin a = 3/5, cos a = 4/5, tan a = 3/4, cosec a = 5/3, sec a = 5/4, dan cotan a = 4/3</p>