≈ 82. Set the calculator to degree mode: tan 1º 0.02 . 87. For the point (−2, −2) , = − 2 = − 2 , x y , = + = r x2 y 2 8 = 2 2 4 + 4 = − 2 2 2 2 2 − θ = ⋅ = − 2 sin 2 2 2 2 = = − cscθ 2 θ 2 2 cos = ⋅ = 4 , = − y For the point (−3, 4) , = −3 , 83. x secθ = 2 2 = − 2 − 2 2 = + = r x2 y2 2 = − 2 25 5 − 2 9 + 16 = − 2 2 2 θ sin = θ θ tan = = 1 cot = = 1 − 2 − 2 4 cscθ = 5 5 4 cosθ 3 −1) = = −1 88. For the point (1, , 1 , x y secθ 5 , =− =− 5 3 1 + 1 = 2 = + = r x2 y 2 θ tan 4 θ cot 3 =− =− 3 4 = = − cscθ 2 2 θ sin = −1 ⋅ 2 = − 2 2 2 2 −1 1 2 2 2 84. For the point (5, −12) , = 5 , x = −12 , y = + r x2 y ⋅ secθ = = 2 = cosθ = 2 25 + 144 169 = 13 = 1 2 2 2 = θ θ cot = 1 = −1 sin 12 θ tan = cscθ 13 −1 = −1 =− =− 13 12 1 −1 = cosθ 5 = secθ 13 13 5 89. For the point (−3, −2) , = −3 , = − 2 , x y θ tan 12 = + = r x2 y θ = − 2 cot 5
82. Set the calculator to degree mode: tan 1º ≈ 0.02 . 87. For the point (−2, −2) , x = − 2 , y = − 2 , r = x2 + y 2 = 4 + 4 = 8 = 2 2 − 2 2 2 2 2 sin θ = ⋅ = − 2 2 2 2 cscθ = = − 2 − 2 83. For the point (−3, 4) , x = −3 , y = 4 , − 2 2 2 cos θ = ⋅ = − secθ = 2 2 = − 2 r = x2 + y2 = 9 + 16 = 25 = 5 2 2 2 2 − 2 − 2 − 2 sin θ = 4 cscθ = 5 tan θ = = 1 cot θ = = 1 − 2 − 2 5 4 cosθ 3 secθ 5 88. For the point (1, −1) , x = 1 , y = −1 , =− =− 5 3 r = x2 + y 2 = 1 + 1 = 2 tan θ 4 cot θ 3 =− =− 3 4 sin θ = −1 ⋅ 2 = − 2 cscθ = 2 = − 2 2 2 2 −1 84. For the point (5, −12) , x = 5 , y = −12 , 1 2 2 2 r = x2 + y 2 = 25 + 144 = 169 = 13 cosθ = ⋅ = 2 2 2 secθ = = 2 1 sin θ 12 cscθ 13 tan θ = −1 = −1 cot θ = 1 = −1 =− =− 13 12 1 −1 cosθ = 5 secθ = 13 13 5 89. For the point (−3, −2) , x = −3 , y = − 2 , tan θ 12 cot θ = − 5 r = x2 + y 2 =