Упростить выражения 1) cos a - ctg a (-sin a) 2) tg(-a)*ctg(-a)+cos^2(-a)+sin^2a

Question

Упростить выражения
1) cos a - ctg a (-sin a)
2) tg(-a)*ctg(-a)+cos^2(-a)+sin^2a

Answer 1

I hope this helps you

---

Comments

рахмат

---

what

---

thank you

---

do you speak Russia?

---

yw, no i don't speak Russian