Tolong di bantu ya 1.Tentukan nilai dari Cos 60°+Sin 150°+Cos 240°+Sin 330° 2.Tentukan nilai dari Sin 30°+Sin 90°-Cos 300°+Cosec 150°

[tex]{Cos 60 + Sin 150 + Cos 240 + Sin 330}\\= \frac{1}{2} + \frac{1}{2} - \frac{1}{2} - \frac{1}{2}\\=\boxed{\boxed{\,\text{0}}} \\\\\\\text{Sin 30 + Sin 90 - Cos 300 + Cosec 150}\\= \frac{1}{2} + 1 - \frac{1}{2} + 2\\= \boxed{\boxed{\,\text{3}}}[/tex]

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Pembahasan :
1||

Cos 60° + Sin 150° + Cos 240° + Sin 330°
= 1/2 + Sin(180 - 150)° + Cos(270 - 240)° + Sin(360 - 330)°
= 1/2 + Sin 30° - Sin 30° - Sin 30°
= 0

2||

Sin 30° + Sin 90° - Cos 300° + Cosec 150°
= 1/2 + 1 - Cos (360 - 60)° + 1/Sin 30°
= 1/2 + 1 - (1/2) + 2
= 3