Complementary Angles - ICSE STD 9 MATHEMATICS Questions

33

Questions

2

Question groups

5

Question types

01

[2 Mark Question Answer]

23 Q→02

[3 marks sum]

10 Q→

Sample Questions

Complementary Angles questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1[2 Mark Question Answer]2 Marks

Evaluate$: 14 \sin 30^\circ + 6 \cos 60^\circ - 5 \tan 45^\circ .$

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Q 2[2 Mark Question Answer]2 Marks

Evaluate $:\operatorname{cosec} (65^\circ + A) - \sec (25^\circ - A)$

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Q 3[2 Mark Question Answer]2 Marks

Evaluate$: \tan (55^\circ - A) - \cot (35^\circ + A)$

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Q 4[2 Mark Question Answer]2 Marks

Evaluate $: \frac{\sin 80^{\circ}}{\cos 10^{\circ}}+\sin 59^{\circ} \sec 31^{\circ}$

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Q 5[2 Mark Question Answer]2 Marks

Evaluate $: 3 \cos 80^\circ \operatorname{cosec} 10^\circ + 2 \sin 59^\circ \sec 31^\circ .$

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Q 6[3 marks sum]3 Marks

In the case, given below, find the value of angle $A,$ where$ 0^\circ \leq A \leq 90^\circ .\cos(90^\circ - A) · sec 77^\circ = 1$

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Q 7[3 marks sum]3 Marks

In the case, given below, find the value of angle $A,$ where $0^\circ \leq A \leq 90^\circ.\sin (90^\circ - 3A).\operatorname{cosec} 42^\circ = 1.$

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Q 8[3 marks sum]3 Marks

A $\triangle ABC$ is right$-$angled at $B;$ find the value of $\frac{\sec A \cdot \sin C-\tan A \cdot \tan C}{\sin B}$.

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Q 9[3 marks sum]3 Marks

Evaluate: $\frac{\cos 70^{\circ}}{\sin 20^{\circ}}+\frac{\cos 59^{\circ}}{\sin 31^{\circ}}-8 \sin ^2 30^{\circ}$

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Q 10[3 marks sum]3 Marks

Evaluate:$\frac{\cot ^2 41^{\circ}}{\tan ^2 49^{\circ}}-2 \frac{\sin ^2 75^{\circ}}{\cos ^2 15^{\circ}}$

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Complementary Angles MATHEMATICS - Complementary Angles

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