Linear Equations in Two Variables (G11)
question 1 of 11
Grade: Eleven - G11
Q: Two lines with slopes m₁ and m₂ are perpendicular if m₁ × m₂ = -1
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Did You Know?
\(\tanθ + \cotθ = \frac{\sinθ}{\cosθ} + \frac{\cosθ}{\sinθ} = \frac{\sin^2θ + \cos^2θ}{\sinθ\cosθ} = \frac{1}{\sinθ\cosθ}\). Dividing by \(\secθ = \frac{1}{\cosθ}\) gives \(\frac{1}{\sinθ\cosθ} \times \cosθ = \frac{1}{\sinθ} = \cscθ\)
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