Questions and answers by

Binoy kumar mahato

Questions (6)

limit x tends to infinity ( 1+root n)/(1-rootn)
1. 1 answer
2. 578 views
if tan A/2 =cosecA-sin A then prove cos^2A/2=cos 36 degree
1. 2 answers
2. 2,510 views
A=170 degree then prove that Tan A/2=-1-rot(1+Tan^2 A)/Tan A
1. 2 answers
2. 1,465 views
cos(A-B)+cos(B-C)+cos(C-A)=-3/2 then prove that cos A+cos B+cos C=0 and sin A+sin B+sin C=0 and also prove that
1. 1 answer
2. 439 views
if cos(B-C)+cos(C-A)+cos(A-B)=-3/2 then prove that cosA+cosB+cosC=O and sinA+sinB+sinC=O after that prove that
1. 1 answer
2. 2,351 views
ifcosX+cosY=a and sinX+sinY=b than prove thatsin2X+sin2Y=2ab(1-2/(a^2+b^2)
1. 5 answers
2. 4,406 views

L.H.S= cos 70/sin 70+4 cos 70 = cos 70+4 cos 70 sin 70/sin 70 =cos 70+2 sin 40/sin 70 = cos 70+2 cos 50/sin 70 = cos 70+cos 50+cos 50/sin 70 = 2 cos 60 cos 10+cos 50/sin 70 = cos 10+cos 50/sin 70 = 2 cos 30 cos 20 /cos 20 = root 3

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