Jawaban:
a) 2sin 30 x cos 30 = sin 60
2( ½) x ½√3 = ½√3
1 x ½√3 = ½√3
½√3 = ½√3
b) sin 45 x cos 45 = ½ sin 90
½√2 x ½√2 = ½ x 1
¼ x 2 = ½
½ x ½
c) 1 + cos 60 = 2 (cos 30)²
1 + ½ = 2 ( ½√3)²
1,5 = 2( ¼ x 3)
1,5 = 2 x 3/4
1,5 = 6/4
1,5 = 1,5
d) sin 60. = Tan 30
1 + cos 60
½√3. = ½√3
1 + ½
3/2
√3 = ½√3
3
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Verified answer
Jawaban:
a) 2sin 30 x cos 30 = sin 60
2( ½) x ½√3 = ½√3
1 x ½√3 = ½√3
½√3 = ½√3
b) sin 45 x cos 45 = ½ sin 90
½√2 x ½√2 = ½ x 1
¼ x 2 = ½
½ x ½
c) 1 + cos 60 = 2 (cos 30)²
1 + ½ = 2 ( ½√3)²
1,5 = 2( ¼ x 3)
1,5 = 2 x 3/4
1,5 = 6/4
1,5 = 1,5
d) sin 60. = Tan 30
1 + cos 60
½√3. = ½√3
1 + ½
½√3 = ½√3
3/2
√3 = ½√3
3
½√3 = ½√3