IIT-JEE
Exam
In a triangle ABC, let angle C=π/2.If r and R are the inradius and the circumradius resp, of a triangle then 2(r+R) is equal to,
(a). a+b
(b). b+c
(c). c+a
(d). a+b+c
Read Solution (Total 2)
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- IF C=pi/2, let the sides of the triangle be a=3, b=4, c=5
so R= 2.5 and r=1
2(R+r)= 2(2.5 +1)=7
verify option..
the correct option is (a).. - 11 years agoHelpfull: Yes(6) No(0)
- In a triangle ABC, let angle C=pi/2.If r and R are the inradius and the circumradius resp, of a triangle then 2(r+R) is equal to,
(a). a+b
(b). b+c
(c). c+a
(d). a+b+c - 11 years agoHelpfull: Yes(0) No(2)
IIT-JEE Other Question
The domain of definition of the function y(x) given by 2^x+2^y=2 is,
(a). (0,1]
(b). [0,1]
(c). (-infinite,0]
(d). (-infinite,1)
Let a and b be non-zero real numbers. Then, the equation (ax2 + by2 + c) (x2 – 5xy + 6y2) = 0 represents
(A) four straight lines, when c = 0 and a, b are of the same sign
(B) two straight lines and a circle, when a = b, and c is of sign opposite to that of a
(C) two straight lines and a hyperbola, when a and b are of the same sign and c is of sign opposite to that of a
(D) a circle and an ellipse, when a and b are of the same sign and c is of sign opposite to that of a.