помогите упростить выражения 1)sin^2a+cos^2a+tg^2b 2)tga/ctga(1-sin^2a). Created by girlssmechinka. algebra-ru

ctga(1-sin^2a)...

July 2022 1 9 Report

помогите упростить выражения

1)sin^2a+cos^2a+tg^2b
2)tga/ctga(1-sin^2a)

Answers & Comments

1nastyazimina1 1)sin^2a+cos^2a+tg^2b=1+tg^2b=1/cos^2b
2)по основному правилу cos^2t+sin^2t=1, cos^2t=1-sin^2t
tga/ctga(1-sin^2a)=sina/cost*sina/cosa*cosa=sin^2a/cosa

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Answers & Comments

poleznee znat neskolko mudryh pravil kotorye vsegda mogli by sluzhit tebe che

pomogite pozhalujchta obyasnite znachenie terminov nestyazhateliiosiflyanestrigo

kakoj obem vodoroda nu vydelitsya pri vzaimodejstvii 200g 40 rastvora etano

v techenie 1 minuty schityvaetsya test vo vremya kotorogo proizvoditsya 25 udarov ka

postarajtes obyasnit chto proishodit s vnimaniem rasseyannogo cheloveka v kazhdom

pomogite dat razvernutyj otvet posle katastrofy pozhar so vzryvom sootvetstven

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