1 . tanθ=ab

• A. $\sin \theta =\frac{b}{a^2+b^2}$
• B. $\cos \theta =\frac{a}{\sqrt{a^{2+}}{b}^2}$
• C. $\sec \theta =\frac{a^2+b^2}{a}$
• D. $\csc \theta =\frac{a^2+b^2}{a}$

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Answer: Option B

Explanation: