Given that the terminal edge of angle α passes through a point P (3, - 1), find sin α, cos α, tan

Given that the terminal edge of angle α passes through a point P (3, - 1), find sin α, cos α, tan

r=√(3²+1²)=√10
∴sina=y/r=-1/√10=-√10/10
cosa=x/r=3/√10=3√10/10
tana=y/x=3/(-1)=-3

Let m = sin θ + cos θ - 1

M = sin θ + cos θ = radical 2 * sin (θ + 45)
Because - 1

If sin θ = M-3 / M + 5, cos θ = 4-5m / M + 5, and θ is the second quadrant angle, find the value of M

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