# Mathematics-Trigonometry (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 8 - 13 of 14

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## Question number: 8

» Mathematics » Trigonometry

MCQ▾

### Question

cos 4x is equal to

### Choices

Choice (4) Response

a.

1 + 8sin2x-cos2x

b.

2cos22x

c.

1 + 2sin22x

d.

1 - 8sin2x-cos2x

## Question number: 9

» Mathematics » Trigonometry

MCQ▾

### Question

In the figure below, PQ = QS, QR = RS and ∠SRQ = 100°. Find the value of ∠QPS.

### Choices

Choice (4) Response

a.

40°

b.

15°

c.

35°

d.

20°

## Question number: 10

» Mathematics » Trigonometry

MCQ▾

### Question

Three circles each of radius r units are drawn inside an equilateral triangle of side a units, such that each circle touches the other two and two sides of the triangle as shown in the figure, (P, Q and R are the Centers of the three circles). Then, relation between r and a is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 11

» Mathematics » Trigonometry

MCQ▾

### Question

If then is equal to

### Choices

Choice (4) Response

a.

b.

c.

d.

All of the above

## Question number: 12

» Mathematics » Trigonometry

MCQ▾

### Question

If then the value of is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 13

» Mathematics » Trigonometry

MCQ▾

### Choices

Choice (4) Response

a.

b.

c.

d.

All of the above

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