Acute Angle

08/07/2021

NCERT problem from Class 11th Maths Chapter 3 - Sine and cosine formulae and their applications
Prove that: a(cosC – cosB) = 2(b – c) cos^2(A/2)
where ABC is a triangle with sides a, b and c and angles A,B and C

sine and cosine formulae and their application class 11 is one of the critical sections in Chapter 3 - Trigonometric functions - for Class 11. Sine and cosin...

04/07/2021

NCERT problem from Class 11th Maths Chapter 3 - Sine and cosine formulae and their applications
A angle of elevation of the top point P of the vertical tower PQ of height h from a point A is 45degree and from a point B, the angle of elevation is 60degree, where B is a point at a distance d from the point A measured along the line AB which makes and angle 30degree with AQ. Prove that d = (√3-1)h

sine and cosine formulae and their application class 11 is one of the critical sections in Chapter 3 - Trigonometric functions - for Class 11. Sine and cosin...

03/07/2021

NCERT problem from Class 11th Maths Chapter 3 - Sine and cosine formulae and their applications
A tree stands 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

sine and cosine formulae and their application class 11 is one of the critical sections in Chapter 3 - Trigonometric functions - for Class 11. Sine and cosin...

02/07/2021

NCERT problem from Class 11th Maths Chapter 3 - Sine and cosine formulae and their applications
Prove that: sin(B – C)/2 =((b – c)/a) cosA/2
where ABC is a triangle with sides a, b and c

sine and cosine formulae and their application class 11 is one of the critical sections in Chapter 3 - Trigonometric functions - for Class 11. Sine and cosin...

01/07/2021

NCERT problem from Class 11th Maths Chapter 3 - Sine and cosine formulae and their applications
Prove that acosA + bcosB + ccosC = 2asinBsinC
where ABC is a triangle with sides a, b and c

sine and cosine formulae and their application class 11 is one of the critical sections in Chapter 3 - Trigonometric functions - for Class 11. Sine and cosin...

30/06/2021

NCERT problem from Class 11th Maths Chapter 3 - Sine and cosine formulae and their applications
Prove that: asin(B – C) + bsin(C – A) + csin(A - B) = 0 ; where ABC is a triangle with sides a, b and c

sine and cosine formulae and their application class 11 is one of the critical sections in Chapter 3 - Trigonometric functions - for Class 11. Sine and cosin...

29/06/2021

NCERT problem from Class 11th Maths Chapter 3 - Sine and cosine formulae and their applications
sin(B – C)/sin(B + C) = b^2 – c^2 / a^2

sine and cosine formulae and their application class 11 is one of the critical sections in Chapter 3 - Trigonometric functions - for Class 11. Sine and cosin...

27/06/2021

https://youtu.be/C4IiFcrEalU
NCERT Exemplar problem from Class 11th Maths Chapter 3 - Multiples and Submultiples of an Angle
What is the value of sinπ/10sin13π/10
a) 1/2 b) -1/2 c) -1/4 d) 1

Class 11th Maths Chapter 3 in Hindi deals with trigonometric functions of multiples and submultiples of an angle. It is one of the most interesting and diff...

27/06/2021

https://youtu.be/3fTb4LvypEE

How to find sin 18 value involves concepts from two key sections within Chapter 3 - trigonometric functions - in class 11th Math. The first section in this t...

27/06/2021

NCERT Exemplar problem from Class 11th Maths Chapter 3 - Multiples and Submultiples of an Angle
If sinΘ + cosΘ = 1, then sin2Θ is equal to
a) 1 b) 1/2 c) 0 d) -1

25/06/2021

NCERT Exemplar problem from Class 11th Maths Chapter 3 - Multiples and Submultiples of an Angle
If tanA = 1/2, tanB = 1/3, then tan(2A+B) is equal to
a) 1 b) 2 c) 3 d) 4

Class 11th Maths Chapter 3 in Hindi deals with trigonometric functions of multiples and submultiples of an angle. It is one of the most interesting and diff...

24/06/2021

NCERT Exemplar problem from Class 11th Maths Chapter 3 - Multiples and Submultiples of an Angle
cos2Θcos2Φ + sin2(Θ - Φ) – sin2(Θ + Φ) is equal to
a) sin2(Θ + Φ) b) cos2(Θ + Φ) c) sin2(Θ - Φ) d) cos2(Θ - Φ )

Class 11th Maths Chapter 3 in Hindi deals with trigonometric functions of multiples and submultiples of an angle. It is one of the most interesting and diff...