# Recently Active Trignometry Questions

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replied2014-03-08 22:35:39
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replied2014-03-08 22:35:23
• If tan2Î¸ = 1-k2,s.t. sec2Î¸+tan3Î¸ cosecÎ¸ = (2-k2)3/2 ...
replied2014-03-07 23:51:54
• A+B+C= Î /2 p.t. +cos2A+cos2B+cos2C=2(1+sinAsinBsinC) ...
replied2014-03-05 23:22:46
• cosec Î¸ = cot Î¸ + âˆš3 ...
replied2014-02-10 15:26:31
• If a,b,c are in H.P.. prove that : sin2 A/2 ,sin2 B/2 and sin2 C/2 ARE ALSO IN h.p. ...
replied2014-01-30 04:45:10
• If sin A,sin B,sin C are in A.P. prove that the altitudes are in H.P . ...
replied2014-01-24 07:05:30
• If cos A + 2 cos B/cos A + 2 cos C = sin B/sin C then prove that the triangle is isoceles or rt. angled. ...
replied2014-01-20 04:11:38
• 16sin22x + 16cos22x = 10 find the number of solutions between (0,2pi) ...
replied2014-01-17 04:38:05
• cosx + cos2x + cos3x + cos4x=2 find the general solutions ...
• 1 )find general solution of 1+ sin3x + cos3x= 3/2sin2x 2)Solve âˆš3cosx - 3sinx= 4sin2xcos3x 3) Solve 3âˆš3sin3x + cos3x + 3âˆš3sinx + cos = 1 ...
replied2014-01-16 23:02:09
• 32tan8Î¸=2cos2Î±+3cosÎ± 3cos2Î¸=1 find the general solution for Î±. ...
replied2014-01-16 05:30:22
• Sin8x+Cos8x=17/32. find the general solution for x. ...
replied2014-01-16 05:05:37
• Cot 2x=Sin x+Cos x find the general solution of x. ...
replied2014-01-16 04:56:41
• cos x-sin 3x=cos2x find the general solution for x. ...
replied2014-01-16 04:54:50
• p.t. tan 70Â°=tan 20Â°+2tan40Â°+4tan 10Â° ...
replied2014-01-16 04:52:25
• if x be real,prove that x^2 -2xcosA +1 x^2 -2xcosB +1 lies between sin^2(A/2)/sin^2(B/2) AND cos^2(A/2)/cos^2(B/2). ...
replied2013-10-25 11:51:15
• Let H be the orthocentre of an acute angled triangle ABC and O be its circumcenter.Then HA+HB+HC A.is equal to HO B.is equal to 3HO C.is equal to 2HO D.is not a scalar multiple of HO in general ...
replied2013-10-24 01:39:45
• \hspace{-16}\bf{\prod_{m=1}^{n-1}\sin \left(\frac{m\cdot \pi}{n}\right)=} ...
• try to Prove cosec (Ï€/7) = cosec(2Ï€/7) + cosec(3Ï€/7) ...
replied2013-10-14 20:21:54
• prove.. 1.cos2Î¸cosÎ¸/2-cos3Î¸cos9Î¸/2=sin5Î¸sin5Î¸/2 2.sinAsin(A+2B)-sinBSin(B+2A)=sin(A-B)sin(A+B) ...
replied2013-08-09 22:17:42
• Given sin(Î¸+Î±)/cos(Î¸-Î±)=1-m/1+m Prove that tan(Ï€/4-Î¸)tan(Ï€/4-Î±)=m ...
replied2013-08-08 18:35:41
• 1.if tanx + tan(x+Ï€/3) +tan(x+2Ï€/3)=3 prove , 3tanx - tan3x/1 - 3tan2x =1 2.if Î±,Î² are two different values of Î¸ when Î±â‰ Î²,where 0< Î±,Î² <2Ï€ which satisfy the equation 6cosÎ¸ + 8sinÎ¸ =9 find the value of sin( ...
replied2013-07-13 20:11:29
• tan 8Î¸ - tan 6Î¸ - tan 2Î¸ =tan8Î¸tan6Î¸tan2Î¸ ...
replied2013-07-11 22:31:14
• advance part 2; ques no. 56.. The least value of k for which 4/sinx + 1/1-sinx = k has a solution between ( 0, Ï€/2 ) . ...
replied2013-06-25 22:10:52
• Prove that sin (nA) = cos n A (n C1 tan A - n C3 tan 3 A + n C5 tan 5 A -............) ...