To solve the problem, we need to find the value of cosA+cosB+cosC in terms of the inradius r and circumradius R of a triangle. 1. Understanding the Expression: We need to evaluate the expression cosA+cosB+cosC. 2. Using the Known Formula: There is a known formula for the sum ...
Let cos(alpha+beta)""=4/5 and let sin (alpha+beta)""=5/(13) where 0lt=... 05:43 Free Ncert Solutions English Medium NCERT Solutions NCERT Solutions for Class 12 English Medium NCERT Solutions for Class 11 English Medium NCERT Solutions for Class 10 English Medium ...
In any triangle A B C , prove that following: \ \ acosA+bcosB+c\ cos C=2bsinAsinC=2csinAsinB
In any triangleABC, prove that:1+cos(A−B)cosC1+cos(A−C)cosB=a2+b2a2+c2 View Solution Free Ncert Solutions English Medium NCERT Solutions NCERT Solutions for Class 12 English Medium NCERT Solutions for Class 11 English Medium NCERT Solutions for Class 10 English Medium ...
(m+2)sin theta+(2m-1)cos theta=2m+1, if 01:31 In a triangle ABC,a/b=2+sqrt(3) and /C=60^(@) then angle A and B is 05:09 In a triangle ABC 05:11 If cosA + cosB =4sin^(2)(C/2), then 05:00 In a triangle ABC, points D and E are taken on side BC such that...
A8sin(A/2)sin(B/2)sin(C/2) B8cos(A/2)cos(B/2)cos(C/2) C8sin(A/2)cos(B/2)cos(C/2) D8cos(A/2)sin(B/2)sin(C/2)Submit If sinA:sinB:sinC=3:4:5, then cosA:cosB is equal to A4:3 B5:3 C3:4 D3:5SubmitIf...