filmov
tv
`(b-c)/a cos^2(A/2)+(c-a)/bcos^2(B/2)+(a-b)/c cos^2(C/2)=`
Показать описание
Doubtnut
Рекомендации по теме
0:05:40
`(b-c)/a cos^2(A/2)+(c-a)/bcos^2(B/2)+(a-b)/c cos^2(C/2)=`
0:03:05
In `DeltaABC`, prove that: `(bcos^(2)C)/2+(c cos^(2)B)/2=s`
0:05:48
If `A+B+C= pi/2`, show that : `cos^2 A + cos^2 B + cos^2 C = 2 + 2 sinA sinB sinC`.
0:09:02
Prove that:- a(cosC - cosB) = 2(b - c) cos²A/2
0:04:57
If in a `DeltaABC acos^2 (c/2) + c cos^2 (A/2) = (3b)/2` , then the sides a, b and c
0:05:42
If `A+B+C=180^0`, prove that : `cos^2(A/2) + cos^2(B/2) - cos^2(C/2) = 2cos(A/2) cos(B/2) sin( C/2)`
0:01:48
Prove that 2(bc.cos A + ca.cos B + ab.cos C) = a² + b² + c² | PROPERTIES OF TRIANGLES | INTER 1st
0:02:16
Show that cosA/a + cosB/b + cosC/c = a² + b² + c²/2abc | PROPERTIES OF TRIANGLES | INTERMEDIATE 1st...
0:59:23
STD 12 MATHS Liberty Paper Set Solution for Board Exam 2025 #BoardExam2025 #liberty #LibertyPaper
0:06:02
Prove that (a - b)² cos²C/2 + (a + b)² sin²C/2 = c²
0:04:26
Trigonometry Class 11 | Cos^2(A/2) + Cos^2(B/2) - Cos^2(C/2) = 2 Cos(A/2) Cos(B/2) Sin(C/2)
0:03:08
If `A+B+C=pi`, then `cos^(2)A+cos^(2)B+cos^(2)C` is equal to
0:04:52
`a( cos B + cos C) = 2(b +c) sin^(2)''(A)/(2)`.
0:04:43
Prove That(sin2A+sin2B+sin2C)/4cos(A/2)cos(B/2)cos(C/2)=8sin(A/2)sin(B/2)sin(C/2)|A+B+C=π|Opt Maths
0:06:15
If A+B+C=3 π/2, then cos 2 A+cos 2 B+cos 2 C is equal to(A) 1-4 cos A cos B cos C (B) 4 sin A sin......
0:05:34
`a(cosC-cosB)=2(b-c)cos^2A/2`
0:05:30
`a(cosB+cosC) = 2(b+c)sin^2(A/2)`
0:01:59
For any triangle ABC, prove that `a(bcosC-c cosB)=b^2-c^2`...
0:05:02
If A+B+C=3pi/2. Then cos 2A +cos 2B+cos2C is equal to | 12 | TRIGONOMETRIC RATIOS AND TRANSFORM...
0:03:53
Using vector method prove that in any triangle `ABC a^2=b^2+c^2-2bc cos A`.
0:09:11
a Cos² A/2 + b Cos² B/2 + c Cos² C/2 = s + delta / R @EAG
0:04:39
If cos^(2)A+cos^(2)B+cos^(2)C=1, then triangle ABC is | 12 | TRIGONOMETRIC RATIOS AND TRANSFORM...
0:03:49
If A+B+C=3 π/2, then cos 2 A+cos 2 B+cos 2 C is equal to (1) 1-4 cos A cos B cos C (2) 4 sin A ......
0:04:26
Prove that in any triangle ABC, cosA=b^2+c^2-a^2/2 b c, where a, b, c are the magnitudes of the s...