Question

tentang trigonometri kak, tunjukkan bahwa.. ​

Answer 1

Jawaban:

e) 1 - cos 60 = Tan 30

sin 60

1 - ½ = √3

½√3

½ / ½√3 = √3

√3 = √3

f) 1 - 2 sin² 45 = cos 90

1 - 2( sin 45)² = cos 90

1 - 2 ( ½√2)² = 0

1 - 2 ( ¼ x 2) = 0

1 - 2(½) = 0

1 - 1 = 0

g) 3 sin 30 - 4 sin³ 30 = 1

3 sin 30 - 4 (sin 30)³ = 1

3(½) - 4 ( ½)³ = 1

3/2 - 4 ( ⅛) = 1

3/2 - 4/8 = 1

3/2 - 1/2 = 1

2/2 = 1

h) 4 cos³ 30 - 3 cos 30 = 0

4 ( cos 30)³ - 3 cos 30 = 0

4 ( ½√3)³ - 3 ( ½√3) = 0

4 ( ⅛ x 3√3) - 3/2 √3 = 0

4 ( 3/8 √3) - 3/2√3 = 0.

12/8√3 - 3/2√3 = 0

3/2√3 - 3/2√3 = 0