hitunglah nilai eksak dari sin 105

sin105 = sin (60+45)
= sin60cos45 + cos60sin45
= 1/2√3 (1/2√2) + 1/2(1/2√2)
= 1/4√6 + 1/4√2
= 1/4(√6+√2)
Semoga bermanfaat...