Question

can some one explain this?plz solve and send i will mark brainliest​

Answer 1

Step-by-step explanation:

smjh le bhai.

utna achha nhi likha

sorry

Answer 2

Step-by-step explanation:

y =3cospix

at x=0

y = 3cos0

y=3

but it is given at x=0 y =a

so a =3

now at x=b

y = 3cospib

but it is given that at x= b

y=0

so , cospi b =0

cos180 b =cos90

b180=90

b=1/2

now a ×b = 3 × 1/2 =3/2