Question 898229
1/sinx = csc(x)
Trigonometric Identities:
sin(-θ)= -sin θ,      cos(-θ) = cos θ,         tan(-θ) = - tan θ
sin(π/2-θ)= cos θ,    cos(π/2-θ) = sinθ, tan(π/2-θ) = cot  θ
csc(x) = 1/sin(x),   sec(x) = 1/cos(x)
sin2 θ + cos2 θ = 1,   sec2 θ = 1 + tan2 θ,   csc2 θ = 1 + cot2 θ