Nilai dari frac cos 120 ° +sin 225 ° cos 240 ° -sin 315 ° adalah . A、 3+ square root of 2 D. 3-2 square root of 2 B. 1+ square root of 2 E. -3+2 square root of 2 C. 3- square root of 2 Question Answer: solved algebra 10 months ago 2710