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Recent questions tagged trigonometric identities
+2
votes
1
answer
Prove that cos 2x cos x/2 - cos 3x cos 9x/2 = sin 5x sin 5x/2
asked
Apr 6, 2019
in
Class 11
by
kratos
cbse
trigonometry
class-11
trigonometric identities
trigonometric functions
+2
votes
1
answer
Prove that √((secθ-1)/(secθ+1))+√((secθ+1)/(secθ-1))=2cosecθ
asked
Apr 6, 2019
in
Class 10
by
kratos
cbse
trigonometry
trigonometric ratios of acute angles
trigonometric identities
class-9
class-10
+2
votes
1
answer
A magnet of magnetic moment M is rotated through 360 in a magnetic field H, the work done will be :
asked
Apr 6, 2019
in
Class 12
by
kratos
neet
jee
properties of magnetic substances
trigonometric identities
jee mains
magnetism and matter
magnetism
class-12
+2
votes
1
answer
Find the set of real ‘ x ‘ for which the function f (x) = 1 / [|x - 1|] + [|12 - x|] - 11 is not defined, where [ . ]
asked
Apr 6, 2019
in
JEE
by
kratos
applications of derivatives
class-11
jee
trigonometric identities
relations and functions
jee mains
functions
relations
+2
votes
1
answer
Write the value of cosec^2θ (1+cosθ) (1-cosθ)
asked
Apr 5, 2019
in
Class 10
by
kratos
trigonometric identities
class-10
+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
+3
votes
1
answer
If A, B, C, D are the angles of a quadrilateral, then (tanA + tanB + tanC + tanD)/(cotA + cotB + cotC + cotD) is equal to
asked
Apr 3, 2019
in
JEE
by
kratos
trigonometry
class-11
jee
trigonometric identities
class-10
jee mains
trigonometric functions
+2
votes
1
answer
Write the value of sinθ cos(90-θ) + cosθ sin(90-θ)
asked
Apr 2, 2019
in
JEE
by
kratos
trigonometric identities
class-10
jee
jee mains
+2
votes
1
answer
find the distance between (-a cos Φ, b sinΦ) and (a sin Φ, -b cos Φ)
asked
Apr 2, 2019
in
JEE
by
kratos
straight lines
class-11
differential equations
jee
definite integral
trigonometric identities
class-10
jee mains
class-12
+3
votes
1
answer
If 2 sec 2α = tanβ + cotβ then one of the values of (α+β) =
asked
Apr 1, 2019
in
JEE
by
kratos
trigonometry
class-11
jee
trigonometric ratios of acute angles
trigonometric identities
class-9
class-10
jee mains
trigonometric functions
+2
votes
1
answer
The greatest real number among sin1, sin2, sin3 and sin (√10 - 2) is
asked
Apr 1, 2019
in
JEE
by
kratos
trigonometry
jee
inverse trigonometry
trigonometric identities
jee mains
inverse trigonometric functions
+1
vote
1
answer
The number of solution of cosx + cos2x + cos3x + cos4x = 0, x ∈ [0, 2π] is (a) 4 (b) 5
asked
Mar 30, 2019
in
JEE
by
kratos
class-11
jee
trigonometric identities
jee main
trigonometric functions
+1
vote
1
answer
A man is walking towards a vertical pillar in a straight path, at a uniform speed. At a certain point A on the path, he observes that the angle
asked
Mar 29, 2019
in
JEE
by
kratos
heights and distances
cbse
trigonometry
jee
trigonometric identities
class-10
icse
jee mains
+1
vote
1
answer
If Sin 3θ = cos (θ – 6°) where 3 θ and θ − 6° are acute angles, find the value of θ.
asked
Mar 28, 2019
in
Class 10
by
kratos
cbse
trigonometry
class-8
trigonometric identities
class-10
trigonometric ratios
+2
votes
1
answer
Prove that tanθ+ 1/tanθ=secθcosecθ
asked
Mar 28, 2019
in
Class 10
by
kratos
trigonometry
trigonometric identities
class-10
+3
votes
1
answer
Prove that (sinθ + cosecθ)^2 + (cosθ + secθ)^2 = 7 + tan^2θ + cot^2θ
asked
Mar 27, 2019
in
Class 10
by
kratos
trigonometry
trigonometric identities
class-10
+1
vote
1
answer
If the sides of triangle a, b, c be in AP, then find the value of tanA/2 + tanC/2.
asked
Mar 27, 2019
in
JEE
by
kratos
trigonometric identities
jee
jee mains
properties of triangles
+3
votes
1
answer
Prove that: (1+cosθ-sin^2θ)/(sinθ(1+cosθ)=cotθ.
asked
Mar 26, 2019
in
Class 10
by
kratos
trigonometry
trigonometric identities
class-10
+2
votes
1
answer
Find the value of 2 sin 3θ cos θ – sin 4θ – sin 2θ
asked
Mar 24, 2019
in
JEE
by
kratos
trigonometry
class-11
jee
trigonometric identities
class-10
jee mains
+3
votes
1
answer
lf solution of the equation 3cos^2 θ – 2√3 sinθ cosθ – 3 sin^2 θ = 0 are nπ + π/r and nπ+ π/* then | r – * | =
asked
Mar 24, 2019
in
JEE
by
kratos
cbse
jee
definite integral
trigonometric identities
matrices
determinants
jee mains
class-12
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