I, II and III are three isotherms respectively at T1, T2 and T3 temperatures. The order of temperature will be
The area of the triangle formed by three points P { at1t2,a(t1+t2) },Q { at2t3,a(t2+t3) },R { at3t1,a(t3+t1) } is _____.
Let θ∈(0,π4) and t1=(tanθ)tanθ,t2(tanθ)cott3=(cotθ)tanθ and t4(cotθ)tanθ , then