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प्रश्न
Choose the correct alternative:
cot θ . tan θ = ?
विकल्प
1
0
2
`sqrt(2)`
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उत्तर
1
cot θ. tan θ = `1/"tan θ"`. tan θ = 1.
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संबंधित प्रश्न
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cotθ + tanθ = cosecθ × secθ
Activity: L.H.S. = cotθ + tanθ
= `cosθ/sinθ + square/cosθ`
= `(square + sin^2theta)/(sinθ xx cosθ)`
= `1/(sinθ xx cosθ)` ....... ∵ `square`
= `1/sinθ xx 1/cosθ`
= `square xx secθ`
∴ L.H.S. = R.H.S.
