GCEMathematicsTrigonometry2021

Simplify $\frac{\sin^2 \theta + \cos^2 \theta}{\cos \theta}$.

A$\sec \theta$CORRECT
B$\tan \theta$
C$\cot \theta$
D$\sin \theta$
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Toaster Teacher
Why the answer is A, and why the others tempt you.
Using the Pythagorean identity, sin²θ + cos²θ = 1, so the expression becomes 1/cos θ = sec θ. Option B (tan θ) is a common distractor since tan θ = sin θ/cos θ, which is different from 1/cos θ.
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