Trigonometry Answers

2sinA + 3cosA = 2

Prove that:

3sinA - 2cosA = +/- 3

A parrel of land has sides measuring175ft, 234ft, 295ft and 415ft and the angle between the sides of the length 234ft and 295ft has measure 137.1° what is the measure of the opposite this angle?

Which angle between 0° and 360° has the same cosine as the angle 63°?

Enter your answer as an integer

Sin 3a+ sin2a- sin a = 4sin a cos a/2 cos 3a/2

if t = tan(x/2), -π<x<π, show that
cos x = (1-t^2)/(1+t^2) and sin x = (2t)/(1+t^2)

if t = tan(x/2), -π<x<π, sketch aright triangle or use trigonometric identities to show that
cos(x/2) = 1/sqrt(1+t^2) and sin(x/2) = t/sqrt(1+t^2)

Two triangles can be formed with the given information. Use the Law of Sines to solve the triangles.

A = 55°, a = 12, b = 14

A triangle has sides a = 2cm, b = 3cm and ÐC = 60o find the length of side c.

Please help prove that (3sinx+2sin2x)/(1+3cosx+cos2x)=tanx where x is a constant......

sin (2 theta) = cos (3 theta)