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ATQ, If each observation is multiplied by 'x', then the new mean becomes 'x' times of average. Therefore, new average = 34.4 × 2.5 = 86
The Value of (sin38˚)/(cos52˚)+ (cos12˚)/(sin78˚)- 4cos²60˚ is
If 2ycosθ = x sinθ and 2xsecθ – ycosecθ = 3, then x 2 + 4y 2 = ?
What is the value of cos [(180 – θ)/2] cos [(180 – 9θ)/2] + sin [(180 – 3θ)/2] sin [(180 – 13θ)/2]?
(tan 5x - tan 3x - tan 2x) = ?
If cos² x + sin x = 5/4, then find the value of 'sin x'.
If x = 4 cos A + 5 sin A snd y = 4 sin A – 5 cos A, then the value of x2+y2 is :
The angles of elevation of the top of a flagpole from two points A and B on level ground are 30° and 60° respectively. The points A and B are on the s...
if 7 sin 2 x + 2 cos 2 x = 4 then find tan x
If 0 ≤ θ ≤ 90°, and sin(2 θ +50°) = cos (4 θ + 16°), then what is the value of θ (in degrees)?
