Question

пожалуйста решите 4 номер!!!!!!

Answer 1

sin15=sin(45-30)=sin 45cos30-cos45 sin30=√ 2/2 *√ 3/2 - √ 2/2* 1/2= √ 6-√ 2/4 = 0,258

Answer 2

cos15 = cos45*cos30 + sin45sin30=√ 2/2 * √ √ 3/2 + √2/2*1/2 =√ 6+√ 2/4 =0.965

Answer 3

tg 15= tg45 - tg30 / 1 +tg45 * tg30 = 3-√ 3/3+√ 3=(3-√ 3)(3+√ 3)/6= 2-√ 3=0.267

Answer 4

bkb

Answer 5

или

Answer 6

tg 15 = sin15 / cos15