Перекладіть англійською мовою вживаючи дієслова у Present Simple, Present Continuous, Present Perfect, Present Perfect Continuous. Очень мне​

Сначала формулы . затем формулы двойного угла sin2α=2sinαcosα cos2α=cos²α-sin²α=cos²α-(1-cos²α)=2cos²α-1⇒  2cos²α=1+cos2α cos2α=cos²α-sin²α=1-sin²α-sin²α=1-2sin²α⇒  2sin²α=1-cos2α а) сos75°cos105°=cos(90°-15°)·cos(90°+15°)== sin15°(-sin15°)=-sin²15°=-(1-cos30°)/2=(cos30°-1)/2= ((√3/2)-1)/2=0,25√3-0,5б) sin75°sin15°=°sin(90°-15°)sin15°=cos15° sin15°=sin30°/2=1/4=0,25в) sin105°cos15°=sin(180°-75°)cos15°=sin75°cos15°=sin(90°-15°)cos15°=cos15°cos15°=(1+cos30°)/2=(1+(√3/2))/2=0,5 +0,25√3 2 способ формулы cosα·cosβ=0,5cos(α-β)+0,5cos(α+β) sinα·sinβ=0,5cos(α-β)-0,5cos(α+β) sinα·cosβ=0,5sin(α+β)+0,5sin(α-β) а) сos75°cos105°=0,5cos(75°-105°)+0,5cos(75°+105°)=0,5cos(-30°)+0,5 cos180°==0,5· √3/2+0,5·(-1)=0,25√3-0,5б) sin75°sin15°=0,5cos(75°-15°)-0,5cos(75°+15° )=0,5cos60°-0,5 cos90°=0,5·0,5=0,25в) sin105°cos15°=0,5sin(105°+15°)+0,5sin(105°-15°)= =0,5sin120°+0,5sin90°==0,5 sin(180°-60°)+0,5·1=0,5 sin 60°+0,5=0,25√3+0,5

1)The state of the environment is determined by the level of concentration of chemicals in the air, soil and water. For example, in the air contains about 0.03% carbon dioxide (permissible norm), which does not affect the human body. If its content is exceeded, it will negatively affect his health. This is also characteristic of other chemical elements and substances.2)Air pollution and land pollution.

3)Take care of water at home. Reduce the amount of chemicals used. Dispose of toxic waste correctly. Paint, engine oil, ammonia, as well as many other substances can not just be washed off to the ground or grass. They penetrate deep into the earth and end up in groundwater. Contact your local wastewater treatment plant for the location of the nearest toxic waste dump. Help find water pollutants. Even a single person can do a lot to keep the water clean. Very often the culprits of water pollution are enterprises and industries. Citizens interested in environmental protection should discuss the problem with the leaders of such enterprises and find ways to protect themselves from pollution.

Join a local conservation organization to help clean up the water in your area, whether it's a river, lake, sea or ocean.

Contact your local authority to discuss your views on maintaining clean water.

Volunteer and help clean beaches and riverbanks.

Get other people involved in water treatment in your area.