Question

sin 470 + sin 610 – sin 110 – sin 250 is equal to

Solution

Correct option is

cos 70

The given expression is equal to

 (sin 470 + sin 610) – (sin 110 + sin 250)

       = 2 sin 540 cos 70 – 2 sin 180 cos 70

       = 2 cos 70 (sin 540 – sin 180

       

SIMILAR QUESTIONS

Q1

The value of the determinant

                          

Is zero if

Q2

  is equal to

Q3

An angle α is divided into two parts so that the ratio of the tangents of these parts is λ. If the difference between these parts is x then sinx/sinα is equal to

Q4

 

 or equal to

Q5

Given θ Ïµ (0,π/4) and t1 = (tan θ)tanθ t2 = (tan θ)cotθt3 = (cot θ)tanθand t4 = (cot θ)cotθ then

Q6

If x = sin αy = sin βz = sin (α + β) then cos (α + β) =

Q7

The radius of the circle

 

Q8

If tan x + tan (x + π/3) + tan (x + 2π/3) = 3, then

Q9

The equation cos 2x + a sin x = 2a – 7 possesses a solution if

Q10