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The value of (sin 60 º cos 30 º - cos 60 º sin 30 º) is equal to:
If x = 4 cos A + 5 sin A snd y = 4 sin A – 5 cos A, then the value of x2+y2 is :
If cos(2θ) = 1 - 2sin²(θ) and tan(θ) + cot(θ) = k, find the value of k when sin(θ) = 3/5.
∆ PQR is right-angled at Q. If ∠R = 60º, then find the value of cosec P.
What is the value of cos75°?
A man is standing at a point 40 meters away from a tower. The angle of elevation of the top of the tower from the point is 45°. After walking 20 meters...
If {(tanx)/(secx)} × cosx = (1/2), then determine the value of ‘sin2x’.
Two points P and Q are at the distance of x and y (where y > x) respectively from the base of a building and on a straight line. If the angles of elevat...
If sec2 θ = 4, then find the value of sin2 θ + cosec (90 - θ) where 0o < θ < 90o.
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