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Recent questions tagged transformation formulae
+3
votes
1
answer
Prove the follow using properties [(α, α^2, β + α), (β, β^2, γ + α),(γ, γ^2, α + β)] = (β - α)(γ - α)(α - β)
asked
Apr 6, 2019
in
JEE
by
kratos
jee main 2021
class-11
jee
transformation formulae
determinants
class-10
jee main
class-12
polynomials
+1
vote
1
answer
If A = [(cosθ,-sinθ),(cosθ,sinθ)] then adj A is (a) [(cosθ,-sinθ),(cosθ,sinθ)]
asked
Apr 4, 2019
in
Class 12
by
kratos
transformation formulae
class-10
class-12
class-11
+2
votes
1
answer
Show that sin8 A/2 sin A = cos A + cos3A + cos 5A + cos 7A
asked
Apr 3, 2019
in
JEE
by
kratos
trigonometry
class-11
jee
transformation formulae
trigonometric identities
class-10
jee mains
+2
votes
1
answer
Prove that: (i) sin 5π/18 – cos 4π/9 = √3 sin π/9 (ii) cos π/12 – sin π/12 = 1/√2 (iii) sin 80° – cos 70° = cos 50°
asked
Apr 3, 2019
in
Class 11
by
kratos
transformation formulae
class-11
+2
votes
1
answer
Find the value of θ, if, cos θ / (1- sinθ) + cos θ/ (1+ sin θ) = 4
asked
Mar 27, 2019
in
Class 12
by
kratos
trigonometry
class-8
class-11
derivatives
transformation formulae
class-10
class-12
+3
votes
1
answer
Figure shows a top view of a square room. One wall is missing, and the wall 33.7° on the right is a mirror.
asked
Mar 21, 2019
in
Class 12
by
kratos
light-reflection and refraction
class-11
transformation formulae
class-10
class-12
trigonometric functions
nuclei
+2
votes
1
answer
If tan α = 1/7, tan β = 1/3, then tan(α + β) = ? (1) 10 (2) 15 (3) 23 (4) None of these
asked
Mar 15, 2019
in
Class 12
by
kratos
trigonometry
class-11
transformation formulae
inverse trigonometric functions
class-12
+1
vote
1
answer
Prove that: (i) 2 sin 5π/12 sin π/12 = 1/2 (ii) 2 cos 5π/12 cos π/12 = 1/2 (iii) 2 sin 5π/12 cos π/12 = (√3 + 2)/2
asked
Mar 13, 2019
in
Class 11
by
kratos
transformation formulae
class-11
+1
vote
1
answer
Prove that: (i) (sin A + sin 3A)/(cos A - cos 3A) = cot A (iii) (sin 9A - sin 7A)/(cos 7A - cos 9A) = cot 8A
asked
Mar 11, 2019
in
Class 11
by
kratos
transformation formulae
class-11
+2
votes
1
answer
If cos α + cos β = 1/2 and sin α + sin β = 1/3.
asked
Mar 11, 2019
in
Class 12
by
kratos
class-11
transformation formulae
class-12
trigonometric functions
+1
vote
0
answers
Express each of the following as the product of two trigonometric reactions. (i) sin 12x + sin 4x (ii) sin 7A – sin 3A
asked
Mar 7, 2019
in
Class 11
by
kratos
transformation formulae
class-10
class-11
trigonometry
+2
votes
1
answer
Prove that sin 5A + sin 3A = 2sin 4A cos A
asked
Mar 3, 2019
in
Class 11
by
kratos
trigonometry
class-11
transformation formulae
trigonometric identities
class-9
class-10
+3
votes
1
answer
Write the value of cot^2θ - 1/sin^2θ
asked
Mar 3, 2019
in
Class 11
by
kratos
transformation formulae
trigonometric identities
class-10
class-11
+3
votes
1
answer
If sin θ + cos θ = √3, then prove that tanθ + cot θ = 1.
asked
Feb 28, 2019
in
Class 11
by
kratos
transformation formulae
class-10
class-11
trigonometry
+1
vote
1
answer
Prove that: (i) sin α + sin β + sin γ – sin (α + β + γ) = 4 sin (α + β)/2 sin (β + γ)/2 sin (α + γ)/2
asked
Feb 25, 2019
in
Class 11
by
kratos
transformation formulae
class-11
+1
vote
1
answer
The value of tan 20° + tan 40° + √3 tan 20° tan 40° =
asked
Feb 20, 2019
in
Class 11
by
kratos
trigonometry
class-11
class-9
transformation formulae
+1
vote
1
answer
If A = 15°, verify that4 sin 2a. Cos 4a sin 6a
asked
Feb 18, 2019
in
Class 12
by
kratos
class-11
transformation formulae
determinants
class-12
class-7
statistics
+3
votes
1
answer
If Cos^2a +Cos^2b = 2 then tan^2a tan^2b=?
asked
Feb 15, 2019
in
Class 11
by
kratos
trigonometrical identities
trigonometry
class-11
transformation formulae
class-10
icse
trigonometric functions
+3
votes
1
answer
Express each of the following as the product of sines and cosines: (i) sin 12x + sin 4x (ii) sin 5x – sin x (iii) cos 12x + cos 8x
asked
Feb 8, 2019
in
Class 11
by
kratos
transformation formulae
class-11
trigonometric functions
+1
vote
1
answer
If a, b, c are in AP or GP HP, then (a - b)/(b - c) is equal to a. b/a or 1 or b/c
asked
Feb 1, 2019
in
JEE
by
kratos
class-11
jee
transformation formulae
jee mains
binomial theorem
sequences and series
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