# Recently Active Trignometry Questions

• FInd the value of : (4 cos29 - 3)(4 sin263 - 3) ...
replied2010-10-22 21:50:07
• *Image* how did we get x/y=c/b? ...
replied2010-10-21 13:22:27
• cosâˆ‚cos2âˆ‚cos3âˆ‚=1/4 {0â‰¤âˆ‚â‰¤180} then 1. sum of the roots of the equation is? 2.find all the roots of this eq. PLEASE GIVE A DETAILED SOLUTION FOR THIS QUESTION. ...
replied2010-10-19 12:20:21
• 3sin x4 + cos x4 =1 find the general solution ...
replied2010-10-17 07:20:31
• 1.Let us define a recursion as: b1 = 1, bn = cos bn-1 Find:- limnâ†’ âˆž(infinity) bn a) does not exist. b) lies between 1 and 2. c) lies between 0 and1/2. d) lies between 1/2 and 1. ...
replied2010-10-14 20:29:15
replied2010-10-12 12:53:30
• If tan(a-b)/tan a+sin2c/sin2a=1,show that tana.tanb=tan2c ...
replied2010-10-12 12:50:04
• If cos (Î¸ â€“ Î±), cos Î¸, cos(Î¸ + Î±) are in HP, then cos Î¸ sec (Î±/2)is equal to (a) -1 (b) âˆ’ 2 (c) 2 (d) 2 ...
replied2010-10-12 10:19:47
• 1/secA-tanA prove this is equal to secA+tanA ...
replied2010-10-11 07:40:49
• Prove that \sqrt [44] {\tan 1^{\circ} \tan 2^{\circ}...\tan 44^{\circ}} < \sqrt 2 -1 <\frac{\tan 1^{\circ} + \tan 2^{\circ}+...+\tan 44^{\circ}}{44} ...
replied2010-10-11 01:35:19
• if sinx+cosx+tanx+cotx+secx+cosecx =7 find x ...
replied2010-10-08 20:59:10
• If A+B+C = Ï€ (pi radian) Prove that: cosA/sinBsinC + cosB/sinCsinA + cosC/sinAsinB =2 ...
replied2010-10-03 12:26:34
• 3 ...
replied2010-09-24 05:01:17
• 1. If sinA + sinB = 2 what is the value of sin(A+B) ? 2. If cos (\beta - \gamma ) + cos (\gamma - \alpha )+cos(\alpha - \beta )= - 3 / 2 show that cos\alpha + cos\beta + cos\gamma = 0 and sin \alpha + sin \beta + sin \gamma = ...
replied2010-09-20 20:29:11
• ques- solve for Î¸: tan2Î¸.tanÎ¸ = 1 i found two ways of solving this but both of them are giving different answers I - by using tan2Î¸ = 2tanÎ¸/1-tan2Î¸ and solving for tanÎ¸ ,i got tanÎ¸ = Â± 1/âˆš3 ie Î¸ = nÎ Â± Î /6 II - ...
replied2010-09-20 06:17:07
• If cos(A-B)=1/2 and sin(A+B)=1/2 ,find the smallest positive values of A and B and also their most general values . ...
replied2010-09-19 04:48:18
• A+B+C=180 degree. Prove that, 1)sin(B+2C) + sin (C+2A) + sin(A+2B) = 4sin(B-C)/2* sin(C-A)/2 *sin(A-B)/2 2) (sin2A+sin2B+sin2C)/(sinA+sinB+sinC) = 8*sin(A/2)*sin(B/2)*sin(C/2) 3)sin(B+C-A) + sin(C+A-B) + sin(A+B-C) =4sinAsinB ...
replied2010-09-18 11:56:47
• What is the exact value of cos 5Â° + cos 77Â° + cos 149Â° + cos 221Â° + cos 293Â°? ...
replied2010-09-18 06:11:42
• Wanted to know whats the main point to keep in mind when solving trigonometries. Most of the time i find it REALLY difficult. for e.g. i jus could not solve this eliminate Î¸ from the following sinÎ¸.sinÎ¸/cosÎ¸= a^3 and cosÎ ...
replied2010-09-17 11:27:19
• When the moon is setting at any given place ,the angle that is subtended at its center by the radius of earth passing through the given place is 57' If the earth's radius be 6400 km ,find approximately the distance of the moo ...
replied2010-09-17 10:49:19
• If sin2Î¸+sin2Ï†= 1/2 and cos2Î¸+cos2Ï†= 3/2 , then cos2(Î¸-Ï†) = a) 3/8 b) 5/8 c) 3/4 d) 5/4 This question is from rd sharma's MCQ.Plz support yur ans with steps. ...
replied2010-09-06 01:00:29
• 1.the radii r1,r2,r3 of escribed circles of a triangle ABC are in harmonic progression.if its area is 24 sq.cm. and its perimeter is 24 cm,find the lengths of its sides. ans:6,8,10 2.In a triangle ABC,if A:B:C =3:5:4,then a+b ...
replied2010-09-04 18:52:45
replied2010-08-24 23:42:16
• tan -1 ( 1/2r2 ) can ne 1 tell hw do i break the above exp in a factor of 2 i.e., in the form of (a - b) so dat i can evaluate the limits easily..... ...
replied2010-08-24 04:56:04
• *Image* ...
replied2010-08-12 06:38:58
• Q1 In a triangle ABC r1= 2r2= 3r3. Find a:b . Q2 In an isoceless triangle ABC one of the angle is 120Â° and radius of incircle is âˆš3.What is the area of the triangle? plz post the whole solution as im getting wrong answer i ...
replied2010-08-09 21:05:13
• 1. If \alpha \neq \beta and atan\alpha + btan\beta = (a+b) tan ((\alpha + \beta)/2) show that cos \alpha / cos \beta = a/b ...
replied2010-08-08 07:45:47
• Solve the inequality sin2x > 2 sin2x + (2- 2 ) cos2x. ...
replied2010-08-06 10:33:08
• Find general value of x which satsfies the equation 2sin(3x+ Ï€/4 ) = 1+8sin2x cos22x . ...