NCERT EXEMPLAR PROBLEMS-SOLUTIONS MATHEMATICS>Chapter 8 - Introduction to Trigonometry and its Applications>Exercise>Q 15

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10th CBSE

IMPORTANT

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If a pole $6 m$ high casts a shadow $2 \sqrt{3}$ m long on the ground, then the Sun's elevation is

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Important Questions on Introduction to Trigonometry and its Applications

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10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS MATHEMATICS>Chapter 8 - Introduction to Trigonometry and its Applications>Exercise>Q 1

\frac{\tan 47 °}{\cot 43 °} = 1

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10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS MATHEMATICS>Chapter 8 - Introduction to Trigonometry and its Applications>Exercise>Q 2

The value of the expression $(\cos^{2} 23 ° - \sin^{2} 67 °)$ is positive.

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10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS MATHEMATICS>Chapter 8 - Introduction to Trigonometry and its Applications>Exercise>Q 3

The value of the expression

(\sin 80 ° - \cos 80 °)

is negative.

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10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS MATHEMATICS>Chapter 8 - Introduction to Trigonometry and its Applications>Exercise>Q 4

\sqrt{(1 - \cos^{2} θ) \sec^{2} θ} = \tan θ

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10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS MATHEMATICS>Chapter 8 - Introduction to Trigonometry and its Applications>Exercise>Q 5

If

\cos A + \cos^{2} A = 1,

then

\sin^{2} A + \sin^{4} A = 1

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10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS MATHEMATICS>Chapter 8 - Introduction to Trigonometry and its Applications>Exercise>Q 6

(\tan θ + 2) (2 \tan θ + 1) = 5 \tan θ + \sec^{2} θ

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10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS MATHEMATICS>Chapter 8 - Introduction to Trigonometry and its Applications>Exercise>Q 7

If the length of the shadow of a tower is increasing, then the angle of elevation of the Sun is also increasing.

HARD

10th CBSE

IMPORTANT

NCERT EXEMPLAR PROBLEMS-SOLUTIONS MATHEMATICS>Chapter 8 - Introduction to Trigonometry and its Applications>Exercise>Q 8

If a man standing on a platform

3 m

above the surface of a lake observes a cloud and its reflection in the lake, then the angle of elevation of the cloud is equal to the angle of depression of its reflection.