solve problem

Question

DETERMINE SIN 2θ, COS 2θ, AND TAN 2θ AND THE QUADRANT IN WHICH 2θ LIES, GIVEN INFORMATION BELOW.

 

TANθ=  -3/4 AND θ IN QUADRANT IV

 

 

Answer 1

For tan θ = -3/4 in QIV:

 

sin θ = -3/5

cos θ = 4/5

 

Now use the double angle formulas to determine sin 2θ, cos 2θ, and tan 2θ.