AM-2700
Trigonometric equations
A Math · Secondary 4 · Hard · Trigonometric equations
Given the identity
cotθ+sinθ=cscθ, solve
cot2θ+1+cos2θsin2θ=0 for
−90∘≤θ≤90∘.
- No solution
- θ=0∘ only
- θ=30∘ only
- θ=−30∘,30∘
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