1.求三角函数值:⑴sin(—(43π)/6)⑵cos(—(83π)/6) ⑶tan(—(41π)/3) ⑷cos((11π)/4) ⑸sin930° 2.化简: ⑴【Cos(x—π) tan(x—2π) tan(2π—x)】/【sin(π+x)】 ⑵((sin^2 )(—x))—tan(360°—x) *tan(—x)—sin(180°—x) cos(360°—x) tan(180°+x) 有谁会,有急用,请速帮忙,需要过程
问题描述:
1.求三角函数值:⑴sin(—(43π)/6)
⑵cos(—(83π)/6) ⑶tan(—(41π)/3) ⑷cos((11π)/4) ⑸sin930° 2.化简: ⑴【Cos(x—π) tan(x—2π) tan(2π—x)】/【sin(π+x)】 ⑵((sin^2 )(—x))—tan(360°—x) *tan(—x)—sin(180°—x) cos(360°—x) tan(180°+x) 有谁会,有急用,请速帮忙,需要过程
答
1.根号3/2 2.根号3/2 3.根号3 4.-根号2/2 5.-1 化简 1.tan(x) 2.2sin^2 (x)-tan^2(x)