Larson Precalculus Trigonometry

sin² Θ + cos² Θ =

• 1

• 0

• -1

• tan² Θ

• tan Θ

• cot Θ

• 1

• none of these

• sin Θ

• csc Θ

• sec Θ

• none of these

1 + tan² Θ =

• sec² Θ

• csc² Θ

• cot² Θ

• none of these

cot² Θ + 1 =

• sec² Θ

• csc² Θ

• tan² Θ

• none of these

• csc² Θ

• sec² Θ

• cos² Θ

• none of these

cos(π/2 - u) =

• sin u

• cos u

• sin(π/2 - u)

• cos(π/2 - u)

sec(π/2 - u)

• sec u

• csc u

• sec(π/2 - u)

• csc(π/2 - u)

sin(-u) =

• sin u

• -sin u

• cos u

• -cos u

cot(-u) =

• cot u

• -cot u

• tan u

• -tan u