Question

yuk dibantu kak!!! :")​

Answer 1

Jawaban:

3. sin 30 = 1/2

4. -1

Penjelasan dengan langkah-langkah:

semoga membantu kak :)

Answer 2

Jawaban:

sin 60° x cos 30° - cos 60° x sin 30°

sin 30° = 1/2

cos 30° = 1/2√3

sin 60° = 1/2√3

cos 60° = 1/2

= 1/2√3 x 1/2√3 - 1/2 x 1/2

= 1/4 x 3 - 1/4

= 3/4 - 1/4

= 2/4

= 1/2 atau sin 30°

cot² A - cosec² A = ?

= ( cos / sin )² - (1 / sin)²

= cos² A - 1 / sin² A

= -(1 - cos² A) / sin² A (identitas trigono)

= - sin² A / sin² A

= -1

3. 1/2 atau sin 30°

4. -1

hope this helps