Question

plz tell me fast all questions answere​

Answer 1

Step-by-step explanation:

1) sin-¹(1/2) =sin-¹(sinπ/6)

= π/6€{-π/2,π/2}

2) given:

x=y² ; 7x+y=0

7y²+y=0

y(7y+1)=0

y=0 ; y=-1/7

when y=0 ;x=0

when y=-1/7 ; x=1/49

3) not interested to give for 5 points

4) similarly