Call me

Have a Query? We will call you right away.

+91

E.g: 9876543210, 01112345678

We will give you a call shortly, Thank You

Office hours: 9:00 am to 9:00 pm IST (7 days a week)

What are you looking for?

Syllabus

What is componendo and dividendo method? Plz explain.

cos20.cos40.cos80=1/8

Prove that.....Tan 70 = tan 20 + 2 tan 50...

Solve Sinx + Sin3x + Sin5x = 0.

how to solve this types of question ??

sin 20 sin 40 sin 60 sin 80=3/16

If a

^{2}- 2a cosx + 1 =674 and tan (x/2) = 7 and the integral value of a is 5k, then k is _________.solution of ml agarwal for isc 11std

The chapter trigonometry in RS Aggarwal book (of class 11th) is divided into 6 sub-chapters. But its chapter 5 ( Solution of triangles ) and 6 ( Graphs of trigonometric functions ) are not the topics of NCERT Book.

Now my question is:

Should I study these two chapters (5 &6 of RS Aggarwal) as these are not in NCERT Book?prove the following :

root 3 cosec 20 - sec 20 = 4

prove that tan20 .tan40.tan80=tan60.

sin

^{4}x+cos^{4}x=1-2sin^{2}xcos^{2}xsinA . sin(60-A) . sin(60+A) = 1/4 sin3A

cos

^{2}x + cos^{2}(x + pi/3) + cos^{2}(x - pi/3) = 3/2. provefind the derivative of cotx by the first principle?

cotx cot2x - cot2x cot3x-cot3x cotx=1

in triangle ABC if b+c/11 = c+a/12 = a+b/13

PT cosA/7 = cosB/19 = cosC/25

prove that cos20 cos 40 cos 60 cos 80=1/16.

in triangle ABC , prove that b^2 sin2C + c^2 sin2B = 2bc sinA

if sin alpha + sin beta= a and cos alpha + cos beta= b, show that

1. Sin(alpha+beta)= 2ab/a sq.+b sq.

2. Cos(alpha+beta)= b sq.-a sq./b sq.+a sq.

prove that cos 10.cos30.cos50.cos70 = 3/16

prove that tan 50 = 2 tan 10 + tan40

153. If sec $\alpha $ and cosec $\alpha $ are the roots of the equation x

^{2}-ax +b =0, then(a) a

^{2}= b(b -2) (b) a^{2}=b (b +2) (c) a

^{2 }+ b^{2 }=2b (d) none of these1.(1+cos pi/ 8) (1+cos 3pi / 8) (1+cos 5pi / 8) (cos 7pi / 8)=1/8

Prove that sin3x + sin 2x – sinx = 4 sinx cos x/2 cos3x/2

sin10*sin50*sin70=1/8?

sin 105 degree +cos 105 degree =cos 45 degree

Prove the following: cosA / 1 - sinA = tan (45 + A/2)

Find the maximum and minimum values of sin^4x + cos^2x and hence or otherwise find the maximum value of sin^1000 x + cox^2008 x

3[sin^4 (3pi/2-x) + sin^4 (3pi+x)] -2 * [{sin^6 (pi/2+x) + sin^6 (5pi - x)]

cos4 pi / 8+cos4 3pi /8 + cos4 5pi / 8 +cos4 7pi /8 =3/2

cos4 pi /8+ cos4 3pi /8+ cos4 5pi /8 +cos4 7pi/ 8=3/2 prove it fast rely plssss

13 sin A+5 sec A divided by 5 tan A + 6cosec A

if A+B=45 degree.show that {1+tanA}{1+tanB}=2

Prove that:

4 cosA cos(60-A) cos(60+A) = cos3A

in any triangleABC P.T

(b

^{2}-c^{2})cotA + (c^{2}-a^{2})cotB + (a^{2}-b^{2})cotC = 0If tanx= -4/3 and x is in the second quadrant; find the values of sin x/2, cos x/2 and tan x/2.

prove that cos11+sin11/cos11-sin11=tan56

Q. A vertical pole fixed to the ground is divided in the ratio 1:9 by a mark on it with lower part shorter than the upper part. If the two parts subtend equal angles at a place on the ground, 15 m away from the base of the pole, What is the height of the pole?

prove using sine rule - 1) sin ( B-C)/2 = b-c/a cos ( A/2)

2)1+cos(A-B) cos C / 1+cos(A-C) cos B = a2+ b2/ a2- c2

3) (b-c)cot (A/2) + (c-a)cot (B/2) + (a-b)cot (C/2) = 0

4) a cos(B-C/2) = (b+c) sin(A/2)

5) c/(a-b) = tan(A/2) + tan(B/2) / tan(A/2) - tan(B/2)

6) a(cos C - cos B) = 2(b-c) cos^2 (A/2)

Prove cos5x=16cos

^{5}x-20cos^{3}x+5cosxPROVE THAT

cos

^{3}A + cos^{3}(120+A) + cos^{3}(240+A) = 3/4 cos3Ashow that tan3x-tan2x-tanx =tan3x*tan2x*tanx

Prove that tan4x= (4tanx(1-tan^2x)) / 1-6tan^x+tan^4x

IF cos(alpha + beta) = 4/5 and sin(alpha - beta) = 5/13

FIND THE VALUE OF tan 2 alpha, where 0 is less than equal to alpha is less than equal to pie/4.

plz reply!!

a tree stands vertically on a hill side which makes an angle of 15degree with the horizontal. from a point on the ground 35m down the hill from the base of the tree, the angle of elevation of the top of the tree is 60degree. find the height of the tree.

ans(35root2m) plese tell the xact solution

Show that cos 24 + cos 55 + cos 125 + cos 204 + cos 300= 1/2

prove that cos 2pi / 15 cos 4pi / 15 cos 8pi / 15 cos 14pi / 15 = 1 / 16

Solve the equation:

4sinxcosx + 2sinx + 2cosx + 1 = 0

prove-

cos

^{2}(pi /8) + cos^{2 (}3pi / 8) +cos^{2}(5pi / 8) +cos^{2 (}7pi / 8) = 2prove cos x + cos y + cos z + cos ( x + y + z ) = 4 cos ( x + y / 2 ) cos ( y + z / 2 ) cos ( z + x / 2 )

If A+B+C = pai, prove that

sinA + sinB + sinC = 4 cosA/2 cosB/2 cosC/2

The angles of a triangle are in AP and the ratio of the number of degrees in the least to the number of radians in the greatest is 60:

π. Find the angles in degrees and radians.

Prove that sin(a) + sin(a+h) + sin(a+2h) +.........+ sin(a+(n-1)h) =

(sin(nh/2) sin(a+(n-1)h/2)/sin(h/2)EVALUATE cos(-1125)

Please explain working

prove that 1+cos2x+cos4x+cos6x= 4cosx cos2x cos3x.

Prove that: cosA cos2A cos4A cos8A =sin16A / 16sinAprove sin

^{2}A - sin^{2}B/sinA .cosA- sinB. cosB = tan(A+B)cos6x = 32cos

^{6}x-48cos^{4}x+18cos^{2}x-1Solve sin2x+sin4x+sin6x=0

find the general solution of equation sinx-3sin2x+sin3x=cos x-3 cos 2X+cos3x