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Recent questions tagged trigonometry
+2
votes
1
answer
The value of cos36° cos42° cos78° is
asked
Apr 7, 2019
in
JEE
by
kratos
trigonometrical identities
trigonometry
jee
class-10
icse
jee mains
+2
votes
1
answer
If (sin α + cosec α)^2 + (cos α + sec α)^2 = K + tan^2α + cot^2α, then K = ? (1) 9 (2) 7 (3) 5 (4) 3
asked
Apr 7, 2019
in
JEE
by
kratos
cbse
trigonometry
jee
class-10
jee mains
+3
votes
1
answer
If tan x = 3/4 and x **** in the third quadrant, find sin X.
asked
Apr 7, 2019
in
JEE
by
kratos
trigonometry
class-11
jee
class-9
jee mains
trigonometric functions
+3
votes
1
answer
Express each one of the following in terms of trigonometric ratios of angles lying between 0° and 45° Cosec 54° + sin 72°
asked
Apr 7, 2019
in
Class 10
by
kratos
trigonometry
class-10
+1
vote
1
answer
As observed from the top of a 80 m tall lighthouse, the angles of depression of two ships on the same side of the light house in horizontal
asked
Apr 6, 2019
in
Class 10
by
kratos
trigonometry
class-10
icse
heights and distances
+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
+1
vote
1
answer
A man sitting at a height of 20 m on a tall tree on a small island in the middle of a river observes two poles directly opposite
asked
Apr 6, 2019
in
Class 10
by
kratos
trigonometry
class-10
icse
heights and distances
+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
+3
votes
0
answers
Two towers of height 14m and 25cm stand on level ground. The angles of elevation of their tops
asked
Apr 5, 2019
in
JEE
by
kratos
heights and distances
cbse
trigonometry
class-10
jee mains 2019
triangles
+2
votes
1
answer
If sin^2 A = 2sinA then find the value of A.
asked
Apr 5, 2019
in
JEE
by
kratos
limits
class- 11
trigonometry
class-11
jee
jee mains
inverse trigonometric functions
limit
class-12
differentiability
continuity
+1
vote
1
answer
The points of contact of the vertical tangents to x = 2 – 3 sinϕ, y = 3 + 2 cosϕ are
asked
Apr 5, 2019
in
JEE
by
kratos
straight lines
cbse
trigonometry
class-11
jee
matrices
determinants
class-10
jee mains
triangle
+3
votes
1
answer
Find x, y, z (whichever is required) from the figure.
asked
Apr 5, 2019
in
Class 10
by
kratos
properties of triangles
trigonometry
class-10
class-7
triangles
congruent triangles
+1
vote
1
answer
The equation (3 + cos x)^2 = 4 – 2 sin^8x has (A) exactly one solution in x ∈ (0, 3π) (B) exactly three solutions
asked
Apr 5, 2019
in
JEE
by
kratos
trigonometry
class-11
jee
class-10
jee mains
class-12
+1
vote
1
answer
Write the value of cot^2 θ -1/sin^2θ.
asked
Apr 4, 2019
in
Class 10
by
kratos
trigonometry
class-9
class-10
cbse
+2
votes
1
answer
In ΔPQR, right-angled at Q, PR+QR=25cm and PQ =5 cm.Determine the values of sin P, cos P and tan P.
asked
Apr 4, 2019
in
Mathematics
by
kratos
trigonometry
class-10
ncert class 10 maths
cbse
+3
votes
1
answer
If x Î (0,1) the greatest root of the equation sin 2px = √2 cos px is
asked
Apr 4, 2019
in
JEE
by
kratos
trigonometry
jee
quadratic equations
class-9
class-10
jee mains
+2
votes
1
answer
If x^siny = y^sinx then find dy/dx.
asked
Apr 4, 2019
in
Class 12
by
kratos
trigonometry
class-12
class-11
trigonometric functions
+1
vote
1
answer
In a ΔABC, if |(1,a,b),(1,c,a), (1, b, c)| = 0, then sin2 A + sin2 B + sin2C =
asked
Apr 3, 2019
in
Class 12
by
kratos
trigonometry
class-12
+2
votes
1
answer
Evaluate [sin 27°/cos 63°] − [cos 63°/sin 27°]2u200b
asked
Apr 3, 2019
in
JEE
by
kratos
cbse
trigonometry
jee
class-10
jee mains
+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
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