2.
Hitung nilai dari setiap pernyataan trigonometri berikut
a.
sin 60° x cos 30° + cos 60° x sin 30°
b.
2(tan 45º)2 + (cos 30º) – (sin 60°)?
cos 45º
sec 30° + csc 30°
sin 30° + tan 45º – CSC 60°
sec 30° + cos 60° + cot 45°
2(cos 60°) + 4 (sec 30° )°-(tan 45º)
2). (cos 30°)​

People all over the world are fond of sports and games.
Sport makes people healthy, keeps them fit, more organized and better disciplined.
It unites people of different classes and nationalities. Many people do sports on their personal initiative. They go in for skiing, skating, table tennis, swimming, volley-ball, football, body-building, etc.
All necessary facilities are provided for them: stadiums, sport grounds, swimming pools, skating rinks, skiing stations, football fields.
Sport is paid much attention to in our educational establishments. Gymnastics is a part of children's daily activities in the kindergartens. Physical culture is ч compulsory subject at schools and colleges.
Professional sport is also paid much attention to in our country. In city, where I live, there are different sporting societies, clubs and complexes.

What is charity today? On television and in other media, we often encounter the word, and is mainly due to the activities of a variety of rich people to give their money to help people in need (orphans, people with disabilities (old people with disabilities), the chronically ill, and so on. Etc. ).. Or with the activities of various non-governmental organizations (charities) collecting the money. But is read out at the media news related to "charity" of the present is that of? Unfortunately no. Everyone on the lips of the case with a charity concert in aid of children with cancer, with the participation of Putin. What ended the concert aware, no help sick children have not been provided. There are certainly other examples, such as the fund Chulpan Khamatova, provide real support to the sick, Raisa Gorbachev Foundation, etc. But often, these organizations do not enjoy popularity among television journalists. Their good deeds behind the scenes of the media. There is also a question. Is charity handiwork only rich people? Of course not! Let us ponder over this word CHARITY. Its direct meaning, do good, that is, to do good, to bring people favor. And can do good only have the powers? No. The well-being of society, its moral health depends primarily on how each of us is ready to do good, good for his neighbor. Under the neighbors I certainly understand not only family and friends, and in general people who live in the same country with me to breathe the same air with me, walk and enjoy with me the same sky. But to begin to do good neighbors, is of course with their loved ones. with mom and dad, brothers and sisters, with their grandparents. From his home. By helping them, we first of all let us give them our duty to them, and secondly, if it comes to schoolchildren, learn how to bring people favor. Taking care of them, listening to their good advice, helping parents with the housework, bringing up a good example of his younger brothers and sisters - we are thus in the future be able to become full members of society. And when we enter adulthood, we can with a clear conscience to do good deeds, and we simply unfamiliar people.