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...
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...
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...
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:...
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Trig identity:tan=sin/cos,高中知识，两边同时乘cosSin=tan*cos是的，但角度要求要不等于1/2π+kπ...
11. Given that d/(dx)(cosx)=-sinx ,d(a) show that (sec x)= sec x tan x.dx Given tha
2、积分出来的结果不确定原因也有两个: 第一、由于有大量的代数、对数、三角的恒等式的出现, 可以在积分结果中互相替换;这种恒等式,在英文 中,用的的formulae。 第二、三角函数中有无数的恒等式,这个恒等式,在英文 中才是identity。3、举例如下: