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 tan θ = 4/3 and θ is an acute angle, find the value of sin θ + cos θ.
If sin A = 3/5 and cos B = 4/5, where A and B are acute angles, find the value of sin(A + B).
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The minimum value of 9 cos2 θ + 36 sec2 θ is
tan 4˚ × tan 43˚ × tan 47˚ × tan 86˚ = ?
