Popular Trignometry Questions

Find the angle? sin(sin-110) ...

*Image* plz post complete solution for it! ...

Six letters are selected from the word RESOLUTION. the probability that S is included is? a.91/150 b.93/155 c.91/154 d.93/154 i m not getting any of these options?????? ...

α= π/7 now prove 1) prove that cosecα=cosec2α+cosec4α ...

If sin(C+A)/sin(C+B)= sinA/ sinB prove thattan^2C=tanA*tanB ...

81sin2x + 81cos2x =30, then the least value of x,(x>0) is what? plz help! ...

(2 3 +4)sinx+4cosx lies in the interval??? (a)(-4,4) (b)(-2 5 ,2 5 ) (c)(-2+ 5 ,2+ 5 ) (d)(-2(2+ 5 ),2(2+ 5 )) ...

if a(x) is the solution of \frac{dz}{dx}-\frac{2}{x}z=\frac{2}{3}x^{4} and z(1)=2/9. then find the value of z(-1) ...

f(x)=5x^{3}-30x^{2}-75x+3 find the interval to which x belongs such that f(x) is decreasing for all real x. ...

if z=x^{2}y +3xy^{4} and x=sin2t \; , y=cost find \frac{dz}{dt}\; at \; t=0 ...

ax+by+ c can be a normal to xy=1 if a] a>0 , b<0 b]a<0 , b>0 c] a and b are of opposite signs d] a=0 , b=0 ...

if f(x)=\int_{0}^{x}{e^{-t^{2}}t^{3}}dt find f(1) ...

if p and q be the perpendiculars from the angular points A and B on any line passing through the vertex C of the triangle ABC, then prove that a2p2+ b2q2 - 2abpq cos C = a2b2 Sin2 C ...

Maximum value of \cos(\alpha_1)\cos(\alpha_2)...\cos(\alpha_n) under the restrictions 0\leq \alpha_1, \alpha_2, .....\alpha_n \leq \pi/2 and cot(\alpha_1)cot(\alpha_2) .....cot(\alpha_n) = 1 is? ...

*Image* ...

xn+1= 0.5(1+xn) , n≥0 Then, cos( 1-xo2 /x1x2x3....∞)=? ...

if in a triangle ABC ,the line joinning circumcentre & incentre is parallel to BC then cosB + cosC = ???...(numerical constant)..... ...

try to Prove Cosec (180/7) = Cosec(360/7) + Cosec(540/7) (Not very easy... but then not very tough either) ...

solve: 2sinx=|x| +a find a such that there is no real root! ...

if α,β are two different values of θ lying between 0 and 2Πwhich satisfy the equation 6 cos θ + 8 sin θ = 9,then find the value of sin(α + β). ...

If sin α + sin β = a and cos α + cos β = b,then prove that sin(α + β) = (2ab/a2 + b2) ...

Proof that (tan5A+tan3A)/(tan5A-tan3A)=4cos4Acos2A ...

1)If sin-1x + tan -1x = , then 2x2 + 1= 2)2 sin -1x = cos-1 (1 -2x2) is true for a. -1<=x<=1 b.-1<=x<=0 c.0<=x<=1 d.None of these 3)7)If sin-1x+sin-1y=2pi/3, cos-1x–cos-1y=pi/3, the number of ordered pairs ...

If tan(inverse)(x+2/x)-tan(inverse)4/x-tan(inverse)(x-2/x)=0 then x=............ y=........... (M.L.Khanna Page 464 Problem No.37a) ...

simplify plz:- tan-1( (3a2x-x3)/a(a2-3x2) ) ...

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. ...

cos2x + cos22x + cos23x + cos24x=2...find the general value of x ...

16sin22x + 16cos22x = 10 find the number of solutions between (0,2pi) ...

cos x-sin 3x=cos2x find the general solution for x. ...

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). ...