Recently Active Trignometry Questions

sin(cos(a))=a and cos(sin(b))=b Then: a) b>a b) b<a c) b=a d) none no idea how to do..pl help ans-- a thnx ...

tan-1y=4tan-1x.prove that tan 22.5° is a solution of x4+1=6x2 ...

for x in [-pi,pi] solve: *Image* this is wat my book says....but i m surprised by equation -cos x =cos x??? experts help!!!! ...

sorry for wasting one thread of tiit...plz delete this one nishant bhaiya! ...

*Image* ...

$Solve the equation\\\\ $tan^{-1}(x-1)+tan^{-1}(x)+tan^{-1}(x+1)=tan^{-1}(3x)$ ...

many good questions are directly solved by experts......let this one be here.... and lets see if an aspirant is able to sove it well the question is quite basic and trivial : \sum_{k=1}^{n-1}{\tan^2\frac{k\pi}{2n}}=\frac{(n-1 ...

please prove the following a3 sin(B-C) + b3sin (C-A) + c3 sin (A-B) = 0 ...

$Determine a positive integer $n$ for which \\\\ $\underbrace{\sqrt{6+3\sqrt{2+\sqrt{2+\sqrt{2........+\sqrt{2}}}}}}_{(n)-times}=2\left \{ sin(\frac{35\pi}{96})+cos(\frac{19\pi}{96}) \right \} ...

1.equation 2 sin x+3 cos x=10 has infinitely many roots. true/false 2.solutions of √sin x = 1/3 and sin x =1/9 are same.true/false plz give some explanation for ur answers too! ...

If θ is the fundamental period of the function f(x) = sin99x + sin99(x + 2π/3) + sin99(x + 4π/3), then the complex number z = r(cosθ + isinθ) lies in the quadrant??? I m getting θ= 2π/3 and hence the ans should be 2... ...

Let " a " and " b " be real numbers in the interval [ 0 , Î / 2 ] . Then for how many integral valued pairs of " a " and " b " must be there who satisfy .......... sin 6 ( a ) + 3 sin 2 ( a ) cos 2 ( b ) + cos 6 ( b ) = 1 Not ...

$Calculate value of $sec^2(\frac{\pi}{9})+sec^2(\frac{2\pi}{9})+sec^2(\frac{4\pi}{9})=$ ...

The Number of triangles which are obtuse and which have the points (8,9),(8,16),(20,25) as the feet of perpendiculars drawn from the vertices on the opposite sides is a)0 b)1 c)2 d)3 ...

$Q:$\Rightarrow$ Find no.of real roots of the Trigonometric equation\\ $sinx+2sin2x=3+sin3x$ in $x\epsilon[0,2\pi].$ ...

A+B+C=pie ( A,B,C>0) AND ANGLE C IS OBTUSE THEN A) TAN A.TAN B >1 B) TAN A.TAN B <1 C) TAN A.TAN B =1 D) NONE OF THESE ...

*Image* i m getting sin 4x (2cosx -1) = 0 what after that???? ...

If A + B + C = 180° then Cos (A - B) = ?...... ...

\frac{\sin 36^\circ}{\sin(\theta+12^\circ)}=\frac{\sqrt 5\sin 12^\circ}{\sin\theta} ...

\sqrt[3]{cos(\frac{2\pi}{7})}+\sqrt[3]{cos(\frac{4\pi}{7})}+\sqrt[3]{cos(\frac{6\pi}{7})} ...

If A+B+C=pi FInd the least value of 2tanA + 3 tan B + tanc. ...

1. (sin-1x+sin-1w) (sin-1y+sin-1z) = π2 then, \begin{vmatrix} X^{N_{1}} & Y^{N_{2}}\\ Z^{N_{3}} & W^{N_{4}} \end{vmatrix} where N1,N2,N3,N4 ε N : a) has a max. value of 2 b) has a min value of -2 c) is independent of Ni d) ...

if x= y cos 2pie/3 = z cos 4pie/3 then xy+yz+xz=? ...

1.If sin-1x + tan-1x =/2 then 2x2 + 1 = a) 5 b)[sqrt(]5-1)/2 c)2 d)none 2.If cos-1x/2 + cos-1y/3 =0, 9x2 - axycosθ + by2=csin2θ prove that a-b+c=44. ...

3SINX - 4 SIN3X - K=0 ANGLE A AND ANGLE B SATISFY THE ABOVE EQUATION. A>B (GIVEN) FIND ANGLE C? WHERE A,B AND C ARE THE ANGLES OF A TRIANGLE ABC....... ...

SIN2X + COS4X = A FIND MAXIMUM VALUE OF A.... ...

Hello all, I am extremely interested in taking FREE online test series for iit-jee.Its just that I want to test myself.I know that even targetiit.com offers it too, but I would like to know the list of other websites which of ...

(1)Find Max. and Min. value of f(a) = (1 + sina) / ( 3 -cosa). (Using Coordinate-Geometry) ...

eliminate θ from the foll eqns.: cosecθ - sinθ = m secθ - cosθ=n i couldnt do this! :( ...

COSθ=COSα-COSβ/1-COSαCOSβ. THEN TAN2(θ/2).TAN2(β/2)=? PLEASE GIVE A DETAILED SOLUTION. ...