Penjelasan dengan langkah-langkah:
TRIGONOMETRI tambah²an
Sin240°.Sin300° + Cosec225°.Sec225°
= Sin(270–30)°.sin(360–60)° + Cosec(270–45)°.Sec(270–45)°
= –cos30°.(–sin60°) –Sec45°.(–cosec 45°)
= –½√3(–½√3) – √2(–√2)
= ¼√3 + 2
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Penjelasan dengan langkah-langkah:
TRIGONOMETRI tambah²an
Sin240°.Sin300° + Cosec225°.Sec225°
= Sin(270–30)°.sin(360–60)° + Cosec(270–45)°.Sec(270–45)°
= –cos30°.(–sin60°) –Sec45°.(–cosec 45°)
= –½√3(–½√3) – √2(–√2)
= ¼√3 + 2
= ¼(8 + √3) ✔