Question

Hasil dari sin²45 derajat - cos²45 derajat.tan45 derajat adalah

Answer 1

Verified answer

Sin² 45° - cos² 45° . tan 45°
= sin² 45° - cos² 45° . 1
= sin² 45° - sin² 45°
= 0

__
sin 45° = cos 45°
tan 45° = 1

Answer 2

Verified answer

→ tan 45 = 1
→ - cos² 45 = sin² 45 - 1
→ sin 45 = 1/2 √2

sin² 45 - cos² 45 . tan 45
= sin² 45 - cos² 45 . 1
= sin² 45 + (sin² 45 - 1 ) . 1
= 2 . sin² 45 - 1
= 2 . (1/2 √2)² - 1
= 2 . 1/4 . 2 - 1
= 1 - 1
= 0