Hello, 1st post.
A little help needed.
We're not allowed to use calculators, so if you could provide answers with working, great!
Sinθ = - 2/5 (negative two fifths) Range: π ≤ θ ≤ 3π/2 (π=pi)
Find Values for:
Im told i am to use the triangles, but i dont get how they work.
Help is appreciated.
Thanks for that.
Working through my assignment, it goes on to ask:
Evaluate Sin2 and Cos2 with the values above.
Ive come up with:
Sin2 = 2sin cos
=> 4√21 / 25
Cos2 = Cos▓ - Sin▓
Could someone confirm or correct my answers?