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.
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?
prove the following :
root 3 cosec 20 - sec 20 = 4
prove that tan20 .tan40.tan80=tan60.
sin4x+cos4x=1-2sin2xcos2x
cos2x + cos2(x + pi/3) + cos2(x - pi/3) = 3/2. prove
cotx 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.
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.
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?
prove the following :
root 3 cosec 20 - sec 20 = 4
prove that tan20 .tan40.tan80=tan60.
sin4x+cos4x=1-2sin2xcos2x
cos2x + cos2(x + pi/3) + cos2(x - pi/3) = 3/2. prove
cotx 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.