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Syllabus

What is componendo and dividendo method? Plz explain.

tan20+tan72+tan88= tan20.tan72.tan88

cos20.cos40.cos80=1/8

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

^{2}45 degree+ cos^{2}135 degree + cos^{2}225degree + cos^{2}315 degreeSolve Sinx + Sin3x + Sin5x = 0.

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

If tan (theta/2) = tan(3 phi/2) and tan phi = 2 tan alpha, prove that theta +phi = 2alpha

solution of ml agarwal for isc 11std

chal waha jaate hain hum waha jaate hain......

koi subhah waha ke raat se na mile

ao hum chale...

pankh laya hu main chalo ud chale...

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 THAT

cos

^{3}A + cos^{3}(120+A) + cos^{3}(240+A) = 3/4 cos3Aprove 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. proveshow that sin

^{3}(180+A) . tan(360-A) . sec^{2}(180-A) / cos^{2}(90+A)cosec^{2}A . sin(180-A) = tan^{3}Acotx cot2x - cot2x cot3x-cot3x cotx=1

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

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

if cosx=-1/2, find the general solution

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

prove that tan 50 = 2 tan 10 + tan40

2U6 - 3U4 is equal to??

(a) 0 (b) 1 (c) -1 (d) none of these

(U4-U2)^2 is equal to ???

(a)1/4sin^4 2thita (b)sin^4 2thita (c)4sin^4 2thita (d) none of these

1.(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

then tan(alpha+beta/2) upon tan (alpha - beta/2) equals ?

a. 1. b. 2. c. 3. d. 4

I want answer with full solution.

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

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

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

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

Prove that:

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

prove that ( cos 6 theta + 6 cos 4 theta + 15 cos 2 theta +10 ) / ( cos 5 theta + 5 cos 3 theta + 10 cos theta ) = 2 cos theta.

pls explain in detail and pls dont link to any other question.

in any triangleABC P.T

(b

^{2}-c^{2})cotA + (c^{2}-a^{2})cotB + (a^{2}-b^{2})cotC = 0A horse is tied to a pole with the help of a rope measuring 22 m. The horse moves in a circular path keeping the rope tight and covers a distance of 66 m. Find the angle (in degrees) traced out by the horse at the pole while moving.

Prove cos5x=16cos

^{5}x-20cos^{3}x+5cosxprove 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)

show that tan3x-tan2x-tanx =tan3x*tan2x*tanx

^{3}(180 degree+A) . tan(360 degree-A) . sec^{2}(180 degree-A) / cos^{2}(90 degree-A)cosec^{2}A . sin(180 degree-A ) = tan^{3}AIF 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!!

(i)SIN (X+Y) (ii)COS Y/2

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

evaluate sin 130 cos 110 + cos 130 sin 110

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

Solve the equation:

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

cos55°+cos125°+cos300°

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

sin15 + cos105 = ?

prove-

cos

^{2}(pi /8) + cos^{2 (}3pi / 8) +cos^{2}(5pi / 8) +cos^{2 (}7pi / 8) = 2If A+B+C = pai, prove that

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

find the derivative of cotx by the first principle?

what is the minimum value of cos^4 theta+sin^2 theta ?

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.

find value of cos 55 +cos 125+ cos 300

prove sin

^{2}A - sin^{2}B/sinA .cosA- sinB. cosB = tan(A+B)Sin(-3333)=

Prove that: cosA cos2A cos4A cos8A =sin16A / 16sinAthe value of 3+cot76cot16/cot76 +cot 16 is

Please explain working

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

solve 3tan((theta)-15)=tan((theta) +15)

EVALUATE cos(-1125)

Solve sin2x+sin4x+sin6x=0

?

prove that

cos20cos40cos60cos80 =1/16