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Syllabus

What is componendo and dividendo method? Plz explain.

find the general solution for 2sinx +root3 cosx =1+ sinx

cos20.cos40.cos80=1/8

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

Solve Sinx + Sin3x + Sin5x = 0.

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

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?sinA . sin(60-A) . sin(60+A) = 1/4 sin3A

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}xcos

^{2}x + cos^{2}(x + pi/3) + cos^{2}(x - pi/3) = 3/2. provecotx cot2x - cot2x cot3x-cot3x cotx=1

find the derivative of cotx by the first principle?

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

how to solve this types of question ??

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

1.(1+cos pi/ 8) (1+cos 3pi / 8) (1+cos 5pi / 8) (cos 7pi / 8)=1/8

prove that tan 50 = 2 tan 10 + tan40

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

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

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

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!!

sin10*sin50*sin70=1/8?

sin 105 degree +cos 105 degree =cos 45 degree

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

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

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

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

Q: prove that cos

^{3}x+ cos^{3 }( 2pi/3 ) + x ) + cos^{3}(2pi/3 )- x)=3/4cos 3x.a^2sin(B-C)/(sinB+sinC) +b^2sin(C-A)/(sinC+sinA) + c^2sin(A-B)/(sinA+sinB) =0

Prove that:

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

1) sin 9 theta= sin theta

in any triangleABC P.T

(b

^{2}-c^{2})cotA + (c^{2}-a^{2})cotB + (a^{2}-b^{2})cotC = 0in triangle ABC , prove that b^2 sin2C + c^2 sin2B = 2bc sinA

prove that cos11+sin11/cos11-sin11=tan56

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)

cos theta.cos2 theta.cos3 theta=1/4 find theta

Prove cos5x=16cos

^{5}x-20cos^{3}x+5cosxfind the general solution of equation sinx-3sin2x+sin3x=cos x-3 cos 2X+cos3x

PROVE 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

Solve root 3 cos x - sin x = 1

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

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) = 2sec theta=m and tan theta=n , then find 1/m[(m+n)+1/(m+n)]

If A+B+C = pai, prove that

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

If x = ycos(2pi/3) = zcos(4pi/3), then xy + yz + zx is equal to?????

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:- tan 82.5 = (under root 3 + under root 2) (under root 2 +1)

EVALUATE cos(-1125)

Please explain working

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

prove that cosec 48+cosc 96+cosec192+ cosec 384=0

Prove that: cosA cos2A cos4A cos8A =sin16A / 16sinAprove that cos 2pi / 15 cos 4pi / 15 cos 8pi / 15 cos 14pi / 15 = 1 / 16

prove 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

ans of ml aggarwal maths