Question

a)5+sin²2+cos²2=
b)tgd•ctg=
c)(1+ctg²2)•sin²2+1
памагите пж​

Answer 1

Ответ:

Объяснение:

a)5+sin²2+cos²2

sin²2+cos²2 = 1

тогда 5+sin²2+cos²2 = 5+1 = 6

б) tgd•ctg = tg * 1/ tg = 1

с) (1+ctg²2)•sin²2+1 = (sin^2/ sin^2 + cos^2/sin^2) * sin^2 +1=

= (sin^2 + cos^2 / sin^2)*sin^2 +1 = 1 +1 = 2