Penjelasan dengan langkah-langkah:
1.sin60°=1/2√3
2.cos 15=cos(45-30)
=cos45xcos30+sin45xsin30
=1/2√2x1/2√3+1/2√2x1/2
=1/4√2x3+1/4√2
=1/4√6+√2
3. tan 75=tan(45+30)
=tan45+tan30/1-tan45xtan30
=1+1/√3/1-1x1√3
=2/√3/√3
=2
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Penjelasan dengan langkah-langkah:
1.sin60°=1/2√3
2.cos 15=cos(45-30)
=cos45xcos30+sin45xsin30
=1/2√2x1/2√3+1/2√2x1/2
=1/4√2x3+1/4√2
=1/4√6+√2
3. tan 75=tan(45+30)
=tan45+tan30/1-tan45xtan30
=1+1/√3/1-1x1√3
=2/√3/√3
=2