Recently Active Trignometry Questions

cos-1(x2-1 / x2+1) + 1/2 * tan-1(2x/1-x2) = 2Ï€/3. Solve for x ...

With usual rotation, in any ΔABC which of the following is/are true...? a) Ex radius opposite to B, altitude through A, Ex radius opposite to C are in H.P. b) If the sines of angles A,B,C are in A.P. then the altitudes of th ...

In triangle ABC , AD is the altitude from A on BC , if angle B =45 degrees and c>b and AD = abc/(2(c^2-b^2)) , then angle A = 1. 30 2 .45 3 .60 4 .75 ...

1. if n is an odd integer (≠1) and -Π<x<0 . Then the solution of the equation cos nx - sinnx = 1 . is given by (a) -Π/6 (b) -Π/4 (c) -Π/3 (d) -Π/2 ...

This is a repost. The last time I posted this one it got buried somewhere Find \sum_{r=1}^n \tan ^{-1} \frac{2r}{2r^4+1} ...

solve cosA + cos B + cos C+ cos (A+B+C) and post the hint ...

what is the max value of cosA + cosB + kcosC \left( 1/2<k<1 \right) in a triangle ...

i have some unsolved questions in inverse trigno..........posting here....... Q1 Find range of values of a if sum of series \sum_{n=1}^{infinity}{(\frac{sec^{-1}\sqrt{\left|x \right|}+cosec^{-1}\sqrt{\left|x \right|}}{\pi a}} ...

good trigonometry questions for iitjee \large 1-\cot 23^{\bullet }=\frac{2}{1-\cot 22^{\bullet }} ...

Sn=cos1+cos2+cos3+cos4+....+cosn Find \lim_{n\rightarrow \infty}\frac{S_{n}}{n} ...

solve thius if tan(45+y/2)=(tan(45+x/2))3 then prove that siny/sinx=3+sin2x/1+3sin2x ...

2sin-1x + cos-1y +3sec-1z = 10(sin-1+cos-1w) [x,y,z are in suitable range] .The value of Tan-1 modulus of {x+1/ (y+2)(z+3)} = ? ...

i have little problems regarding finding the maximum and minumum values of trigonometrical functions...i would like a little help on this one....if perhaps u can provide me wih some notes having detail explanation on this top ...

WELL THIS MIGHT SEEM ILLOGOCAL TO FEW PEOPLE BUT I KNOW THAT MOST OF THEM DONNO THIS. BUT VERY USEFUL IN SOME PROBLEMS. in a triangle ABC, medianof BC , AD is drawn. what is lengthof AD? { in terms of a,b,c ,} D is mid point ...

WELL THIS MIGHT SEEM ILLOGOCAL TO FEW PEOPLE BUT I KNOW THAT MOST OF THEM DONNO THIS. BUT VERY USEFUL IN SOME PROBLEMS. in a triangle ABC, angle bisector of A, AD is drawn. what is lengthof AD? {of course in terms of a,b,c ,A ...

question edited:: find the no. of positive integral pairs of the solution of (x+y)/(1-xy) = 3 i know this shud be in algebra but actually this is one step of an inverse trig. question.... options: (a) one (b) zero (c) two (d) ...

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1) The greatest value of (sin-1x ) 3 +( cos-1 x) 3 2) The value of sin(cot-1 (cos(tan-1 x)) 3) The smallest and the largest values of tan-1 [( 1-x) / (1+x)] ...

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Two adjacent sides of a cyclic quadrilateral are 2 and 5 units,the angle between them is 60 degrees . Area of quad = 4 3 units ,find the area of the circle ...

A tower subtends angle x° at a point A at its base plane. If the angle of depression of the foot of the tower at a point B at b height above A is y°, then the height of the tower is ans : B tan x° cot y° DIAGRAM SHALL B E ...

a2 + b2 + c2 + r2 + rA2 + rB2 + rC2 + R2 = ........... (A) 7 R2 (B) 7 r2 (C) 17 R2 (D) 17 r2 a,b,c : sides of ∆le ABC r : inradius rA,rB,rC : exradii R : circumradius ...

the number of ordered pairs (a,b) where a,b belongs to (-Ï€,Ï€) satisfying cos (a-b) =1 and cos (a+b) =1/e will be ??????????? ...

If A,B,C are acute positive angles such that A+B+C=Πand cot A cot B cot C=k,then a) k≤1/3√3 b) k≥1/3√3 c) k<1/9 d) k>1/3 The ans is a..... but please can ny 1 giv a proper method 4 dis.... ...

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

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If the lengths of medians are 2 unit,3 unit,4 unit,then the area of the triangle is A)Area >4 3 B)Area <4 3 C)Area≥4 3 D)Area≤4 3 ...

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if A=B=pi/2 what is tan (A+B)=-infinity(formulae) it should be zero why ...

In a triangle ABC, tanA + tanB + tanC = k, then for what values of k :- a) there exists exactly one isosceles triangle ABC. b) there exists exatly two non-similar isosceles triangle ABC. please solve the answer.. ...