接下来,是三角函数的基本恒等式,它描述了cosX和sinX之间的关系: 中文: cos2X+sin2X=1\cos^2 X + \sin^2 X = 1cos2X+sin2X=1 (勾股定理的三角函数形式) 英文: cos2X+sin2X=1\cos^2 X + \sin^2 X = 1cos2X+sin2X=1 (Pythagorean identity in trigonometry) 此外,还有一些重要的...
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8. (a)Given that d/(dx)(cosx)=-sinx x showthatd/(dx)(scC.x)=secxtanx .dx(3)Given that x = sec 2y(h) find in terms of y.(2)(c) Hence find in terms of.x.(4) 相关知识点: 试题来源: 解析(a) Writes secx as and givesConvincing proof. Must see both (b)(c) A...
显然cosxtanx的定义域是不等于k pi+pi/2，sinx定义域是R，显然不相等，但是如果对sin x加限制是可以...
Answer to: Prove the identity: (sin^2x)/(tanx)=(sinx)(cosx) By signing up, you'll get thousands of step-by-step solutions to your homework...
解析 (sin x + sin 5x)+ (sin 2x + sin 4x)+ sin 3x LHS = (cos x + cos 5x)+ (cos 2x + cos 4x)+ cos 3x =(2sin3xcos2x+2sin3xcosx+sin3x)/(2cos3xcos2x+2cos3xcosx+cos3x) =(sin3x(2cos2x+2cosx+1)/(cos3x(2cos2x+2cosx+1))=RHS ...
Answer to: Verify the identity. cosx+cotxsinx / cotx = 2sinx By signing up, you'll get thousands of step-by-step solutions to your homework...
但是当x=90°时，按理说sinx=1，可是按这个公式不就是不存在吗？求大佬解答Trig identity:...
11. Given that d/(dx)(cosx)=-sinx ,d(a) show that (sec x)= sec x tan x.dx Given that x = sec 2y,dx(b)find I in terms of y.dy(c))Hence find dy in terms of x.dx 相关知识点: 试题来源: 解析(a) y = sec x = = = -1 (-sinx) = {} = ()() = secxtanx(b...
百度试题 结果1 题目(7) ∫(1+sinx)^2dx 相关知识点: 试题来源: 解析 c7)-11t2sinx tsin' =1+2sinx+J—co2xby trig identity =x-2cosx+1/2x-1/4sin2x+C =3/2x-2cosx-1/4sin2x+C 反馈 收藏