为方便表示，将原待证命题改写为： \forall x\in\mathbb R, |\!\cos x|+|\!\cos 2x|+\cdots+|\!\cos nx|\ge\frac{n-1}2\qquad(n\in\mathbb Z_{>0})\\要证明这个命题，首先考虑证明如下引理： 引理：对任意正整数 n ，都有 ...

Many people today deny the reality of original sin. Modern thinkers claim that evolution disproves it. Some object to the idea of inheriting sin from our parents, while others simply deny sin itself.

Elon Musk’s X has started expanding the rollout of its dedicated vertical video feed to users around the globe just days after its debut in the U.S., TechCrunch has exclusively learned and ...

In this article, we will be taking a look at the 10 best sin stocks to invest in 2025. Sin Stocks: Is Now the Time to Invest? Sin stocks are shares of companies involved in activities that are ...

Q. 274. How is sin divided? A. (1) Sin is divided into the sin we inherit called original sin, and the sin we commit ourselves, called actual sin. (2) Actual sin is sub-divided into greater sins ...

X (formerly Twitter) to launch X Money and X TV services in 2025 The platform aims to become an "everything app," competing with WeChat X TV is speculated to offer live sports and other media ...

Elon Musk has unveiled plans for a significant update to the algorithm of X. In a series of posts on the platform, Musk emphasised the importance of prioritising content that users find genuinely ...

Hours before ringing in the new year, the CEO of X, formerly Twitter, announced the platform will launch a payment system, X Money, in 2025. In an X post on Tuesday afternoon, CEO Linda Yaccarino ...

'Pepe the Frog' is a famous meme trending for years. Elon Musk, the tech billionaire who is one of the most talked personalities in the world currently, has created a buzz on the internet again by ...

Elon Musk bizarrely changed his X profile name to “Kekius Maximus” on Tuesday — sparking a flood of questions from supporters and critics alike. The world’s richest man, who boasts nearly ...

Prior to iOS 18, if you wanted to figure out how to split a bill with your texting group from afar, you'd have to use your calculator app or Spotlight and then switch back to Messages. With iOS 18 you ...