Verify the identity sin(x + 3pie/2) + cosx =0
I need to know the trigonometric functions and trigonometric identities.
Prove this identity. (cot^2 X) - (cos^2 X) = (cot^2 X)(cos^2 X)
Three forces acting at a point are in equilibrium. The forces are 930 lb, 760 lb, and 1220 lb. Find the angles between the directions of the forces. (Hint: Arrange the forces to form the sides of a triangle.)
Inverse cos of (square root of 2/2)
The foot, F, of a hill and the base B, of a vertical tower TB, 27 metres tall, are on the same horizontal plane. From the top, T, of the tower, the angle of depression of F is 32.7 degrees. P is a point on the hill 27.5 metres away from F along the line of greatest slope. T, B, F and P all lie in the same vertical plane. The ang
1)If sin(t) = -5/13 and 270 degrees is less than or equal to t and is less than or equal to 360 degrees, then cos(t)=? 2)If 0 degrees is less than t and less than 90 degrees and cos(t) = 4/5, then cos(2t)=? 3)A right triangle is shown, sec(t) =? . | 1 = hypotenuse . | x = y
Prove 1-sinx/1+sinx=sec^2x-2secxtanx + tan^x