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\tan θ = \frac{a}{b}

হলে নিচের কোনটি সত্য?

\sin θ = \frac{b}{a^{2} + b^{2}}

\cos θ = \frac{a}{\sqrt{a^{2} + b^{2}}}

s e c θ = \frac{a^{2} + b^{2}}{a}

\cos e c θ = \frac{a^{2} + b^{2}}{a}

ANS : 2

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