Bhai Ise dekhna. Pan paper nhi han mere pass abhi

Bhai koi ye wala bta do.

a-b=B-c/bc
B-c=c-a/ac
C-a=a-b/ab
Multiply all
(A-b)(B-c)(c-a)=(a-b)(B-c)(c-a)/(abc)^2
(Abc)^2=1
+-1

8*18=9*16. So 9
1/2=81+324-x^2/2*9*18
162=405-x^2
X=243=9√3
2*16*18*1/2=256+324-y^2
288=580-y^2
Y^2=292=4*73=2√73
Cosa@=49+292-243/2*7*2√73
=7/2√73. Sin@=√1-49/292
=9√3/2√73
1/2 *2√73*7*9√3/2√73
1/2 of 63*√3
R=2√73*7*9√3/2*63*√3
=√73. Area 73π

Find the value of x.
@imgroooot @Riyanssh @Cylus12

-1/2=1+y^2-1-x^2-2x/2y
-y=y^2-x^2-2x
X^2+2x=y^2+y
1/x=y*sin30/1
Xy=2
X^2+2x=4/x^2+2/x
X^4+2x^3=4+2x
X^4+2x^3-2x-4=0
X^3(x+2)-2(x+2)=0
(X+2)(x^3-2)=0
X=2^1/3

Easy and conceptual question

2,4,6,8,....
70th term 70*71=4970
71th. Term=5112
4970+71=5441
1+7+7+7=22