Let the function f(x) = x² + 9

What is lim (√f(x) − 3) / (√f(x) + 7 − 4) as x → 0 equal to?

If 5sinθ + 12cosθ = 13, then what is 5cosθ – 12sinθ equal to?

If tanθ + secθ = m, then what is secθ equal to?

What iscos²(45° + θ) + cos²(45° – θ)———————————————————————tan(60° + θ) · tan(60° – θ)  equal…

What is the angle of elevation of the sun when the shadow of a pole…

If sinθ + cosθ = √3, then what is tanθ + cotθ equal to?