At -90- which of the two angles are not defined-

The correct option is D tan θ, θ As tan θ = sin θ/cos θ and at θ = 90^∘, cos 90^∘ = 0. So, tanθ is not defined. Similarly, θ =1/cos θ. So, θ is also not d ...

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Standard X

Mathematics

Standard Values of Trigonometric Ratios

At θ=90∘ whic...

Question

At $θ = 90^{\circ}$ which of the two angles are not defined?

$cot θ, sin θ$

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$tan θ, c o s e c θ$

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$cot θ, tan θ$

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$tan θ, sec θ$

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Solution

The correct option is D
$tan θ, sec θ$

As $tan θ = \frac{sin θ}{cos θ}$ and at $θ = 90^{\circ}, cos 90^{\circ} = 0$ . So, $tan θ$ is not defined.

Similarly, $sec θ = \frac{1}{cos θ}$ . So, $sec θ$ is also not defined at $θ = 90^{\circ}$ .

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At θ=90∘ which of the two angles are not defined?

The correct option is D tan θ, sec θ As tan θ=sin θcos θ and at θ=90∘, cos 90∘=0. So, tanθ is not defined. Similarly, sec θ=1cos θ. So, sec θ is also not defined at θ=90∘.

At $θ = 90^{\circ}$ which of the two angles are not defined?

The correct option is D
$tan θ, sec θ$

As $tan θ = \frac{sin θ}{cos θ}$ and at $θ = 90^{\circ}, cos 90^{\circ} = 0$ . So, $tan θ$ is not defined.

Similarly, $sec θ = \frac{1}{cos θ}$ . So, $sec θ$ is also not defined at $θ = 90^{\circ}$ .