Which of the following is positive number?

Important Questions on Trigonometric Functions

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IMPORTANT

Gamma Question Bank for Engineering Mathematics>Chapter 9 - Trigonometric Functions>EXERCISE 3.1>Q 8

$\cos 45°·\cos 46°·\cos 47°....\cos 135°=$

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IMPORTANT

Gamma Question Bank for Engineering Mathematics>Chapter 9 - Trigonometric Functions>EXERCISE 3.2>Q 12

The maximum value of $\sin x_1+2\sin x_2+3\sin x_3$ is

EASY

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IMPORTANT

Gamma Question Bank for Engineering Mathematics>Chapter 9 - Trigonometric Functions>EXERCISE 3.2>Q 13

Domain of $\sin 8x$ is

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IMPORTANT

Gamma Question Bank for Engineering Mathematics>Chapter 9 - Trigonometric Functions>EXERCISE 3.2>Q 14

Range of $\cos 4x$ is

HARD

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IMPORTANT

Gamma Question Bank for Engineering Mathematics>Chapter 9 - Trigonometric Functions>EXERCISE 3.2>Q 15

Find the number of real values of $x$ satisfying the equation $2\sin x=x+\frac{1}{x}$.

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IMPORTANT

Gamma Question Bank for Engineering Mathematics>Chapter 9 - Trigonometric Functions>EXERCISE 3.3>Q 16

If $\tan \theta =\frac{b}{a}$, then the value of $\cos 2\theta$ is

MEDIUM

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IMPORTANT

Gamma Question Bank for Engineering Mathematics>Chapter 9 - Trigonometric Functions>EXERCISE 3.3>Q 17

If $\sin A=\frac{3}{5}$ and $\cos B=\frac{9}{41},0<A<\frac{\pi }{2}$, and $-\frac{\pi }{2}<B<0$ then $\sin \left(A-B\right)$ is equal to

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IMPORTANT

Gamma Question Bank for Engineering Mathematics>Chapter 9 - Trigonometric Functions>EXERCISE 3.3>Q 18

The value of$\mathrm{ }\mathrm{s}\mathrm{i}\mathrm{n}36°\sin 72°\sin 108°\sin 144°$is equal to