Trigonometry Answers

2sinx/sin3x + tanx/tan3x =1 . prove this

sin3x + cos2x =-2

sinx +tanx/2 = 0 .find general solution

cos-1(-1/2)

prove
cot(a+b)cot(a-b)={cos^2(b)-sin^2(a)}/{sin^2(a)-sin^(b)}

Find set of all possible values of a in [-pi,pi]such that sqrt((1-sina)/(1+sina)) ls equal to (seca – tana)

: an aeroplane is moving one km high from west to easthorizontally from a point on the ground. The angle of elevation of the aeroplane is 60' and after 10 sec the angle of elevation of the plane is observed as 30'. Find the speed of the plane in km/hr

What is the exact value of sec A if it passes through P(2,-2) in standard position?

if 4tan=3 and 180<*<360

if you have a 4 degree angle and one side (a) equals 7 what is the other side? (b)