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[tan^2x/(tan^2x-1)]+[cosec^2x/(sec^2x-cosec^2x)]=1/(sin^2x-cos^2x)
Prove that

tan10tan50 + tan50tan70 + tan70tan170 = 3
sin(x+3y) + sin(3x+y) ÷ sin2x + sin2y = 2cos(x+y)
If tan x = a and tan y = b
Show that sin(x+y) = (a+b) ÷ √(1+a^2)(1+b^2)
If x=a*sinQ + b*cosQ and y=a*cosQ + b*sinQ

Prove that (x^2+y^2)(a^+y^2) - 4abxy = (a^2 - b^2)^2
cos55 degree ka solucation with proof giving the answer fast
Two buildings are 25 m apart. From the top of the shorter
building, the angles of elevation and depression of the top and bottom
of the taller building are 31° and 48° respectively. What is the height
of the taller building? Give your answer to the nearest metre.
Two surveyors A and B left P at the same time.A moved at a speed of 6km/hr on a bearing of 043degrees,while B moved at a speed of 4.5 km/hr on a bearing of 115degrees.calculate the distance between A and B after 4 hours and the Bearing of B from A
(a) A box is resting on the ground and you can assume its location is the origin of the system. A person applies a force of 117 N to the box at angle of 305 degrees. Determine the horizontal component of the force applied to the box.
A box is resting on the ground and you can assume its location is the origin of the system. A person applies a westward force of 31.7 Newtons (N) to the box while another applies a northward force of 43.5 N to the box. Determine the total force applied to the box.
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