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Integration of Trigonometric Functions

If tan 2θ = 2...

Question

If ${tan}^{2} θ = \frac{20}{21}$ , then cos²θ equals

यदि ${tan}^{2} θ = \frac{20}{21}$ , तब cos²θ का मान है

A

\frac{41}{21}

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B

\frac{21}{20}

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C

\frac{21}{41}

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D

\frac{19}{21}

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Solution

The correct option is C $\frac{21}{41}$

Solution

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Similar questions

U = {cot}^{- 1} \sqrt{cos 2 θ} - {tan}^{- 1} \sqrt{cos 2 θ}

sin U

{tan}^{- 1} (x) + {tan}^{- 1} (\sqrt{3}) = \frac{π}{2}

then x is equal to

यदि

{tan}^{- 1} (x) + {tan}^{- 1} (\sqrt{3}) = \frac{π}{2}

, तब x का मान बराबर है

sin θ = - \frac{3}{5}

and θ lies in IV quadrant, then cosθ + cotθ equals

यदि

sin θ = - \frac{3}{5}

तथा θ, IV चतुर्थांश में स्थित है, तब cosθ + cotθ का मान बराबर है

\frac{{sin}^{2} θ}{7} + \frac{{cos}^{2} θ}{7} = \frac{x}{21}

x

A = ⎡ ⎣ \begin{matrix} 1 & t a n \frac{θ}{2} - t a n \frac{θ}{2} & 1 \end{matrix} ⎤ ⎦

and AB = I, then B =

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