Mathematics Standard 9>Chapter 6 - Trigonometry>Exercise>Q 4

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9th Tamil Nadu Board

IMPORTANT

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The value of $\frac{2 \tan 30 °}{1 - \tan^{2} 30 °}$ is equal to

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Important Questions on Trigonometry

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 6 - Trigonometry>Exercise>Q 5

If

2 \sin 2 θ = \sqrt{3}

then the value of

θ

is

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 6 - Trigonometry>Exercise>Q 6

The value of

3 \sin 70 ° \sec 20 ° + 2 \sin 49 ° \sec 51 °

is

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 6 - Trigonometry>Exercise>Q 7

The value of

\frac{1 - \tan^{2} 45 °}{1 + \tan^{2} 45 °}

is

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 6 - Trigonometry>Exercise>Q 8

The value of

cosec (70 ° + θ) - \sec (20 ° - θ) + \tan (65 ° + θ) - \cot (25 ° - θ)

is

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 6 - Trigonometry>Exercise>Q 9

The value of

\tan 1 ° \tan 2 ° \tan 3 ° \dots \tan 89 °

is

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 6 - Trigonometry>Exercise>Q 10

Given that

\sin α = \frac{1}{2}

and

\cos β = \frac{1}{2}

, then the value of

α + β

is

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 6 - Trigonometry>Solved Example>Q 1

For the measures in the figure, compute sine, cosine and tangent ratios of the angle $θ$ .

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9th Tamil Nadu Board

IMPORTANT

Mathematics Standard 9>Chapter 6 - Trigonometry>Solved Example>Q 2

Find the six trigonometric ratios of the angle $θ$ using the given diagram.

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