sin225°+sin265° =sin225°+sin2(90°−25°) =sin225°+cos225°=160 (c) We know that the maximum value of sin θ = 1 And the maximum value of cos θ = 1 Therefore,secα=
1
4
and cosecγ=
1
2
are not possible tan θ can assume any value. Therefore, only tan β = 20 is possible.