If $\cos 3\theta =\frac{\sqrt{3}}{2}; 0<\theta <20°$, then the value of $\theta$ is: 

Important Questions on Introduction to Trigonometry

MEDIUM

10th CBSE

IMPORTANT

DINESH LAB MANUAL IN MATHEMATICS CLASS X>Chapter 8 - Introduction to Trigonometry>MCQs (MULTIPLE CHOICE QUESTIONS)>Q 68

Expressing $\sin A$ in terms of $\cot A$ is

EASY

10th CBSE

IMPORTANT

DINESH LAB MANUAL IN MATHEMATICS CLASS X>Chapter 8 - Introduction to Trigonometry>MCQs (MULTIPLE CHOICE QUESTIONS)>Q 69

The value of ${\sin }^{2}30°+{\cos }^{2}45°+{\cos }^{2}30°$ is

MEDIUM

10th CBSE

IMPORTANT

DINESH LAB MANUAL IN MATHEMATICS CLASS X>Chapter 8 - Introduction to Trigonometry>MCQs (MULTIPLE CHOICE QUESTIONS)>Q 70

If $\tan 2A=\mathrm{c}\mathrm{o}\mathrm{t}(A-18°)$, then the value of $A$ is

MEDIUM

10th CBSE

IMPORTANT

DINESH LAB MANUAL IN MATHEMATICS CLASS X>Chapter 8 - Introduction to Trigonometry>MCQs (MULTIPLE CHOICE QUESTIONS)>Q 71

If $\sin \theta =\frac{1}{2}$, then the value of $\sin \theta (\sin \theta -\mathrm{cosec}\theta )$ is

EASY

10th CBSE

IMPORTANT

DINESH LAB MANUAL IN MATHEMATICS CLASS X>Chapter 8 - Introduction to Trigonometry>MCQs (MULTIPLE CHOICE QUESTIONS)>Q 72

The value of $\sin \theta \cos \left(90°-\theta \right)+\cos \theta \sin \left(90°-\theta \right)$ is:

MEDIUM

10th CBSE

IMPORTANT

DINESH LAB MANUAL IN MATHEMATICS CLASS X>Chapter 8 - Introduction to Trigonometry>MCQs (MULTIPLE CHOICE QUESTIONS)>Q 73

If $\cot \theta =\frac{7}{8}$, then the value of $\frac{(1+\cos \theta )}{(1-\sin \theta )}\times \frac{(1-\cos \theta )}{(1+\sin \theta )}$ is:

MEDIUM

10th CBSE

IMPORTANT

DINESH LAB MANUAL IN MATHEMATICS CLASS X>Chapter 8 - Introduction to Trigonometry>MCQs (MULTIPLE CHOICE QUESTIONS)>Q 74

If $\cos (20°+\theta )=\sin 30°$, then the value of $\theta$ is:

MEDIUM

10th CBSE

IMPORTANT

DINESH LAB MANUAL IN MATHEMATICS CLASS X>Chapter 8 - Introduction to Trigonometry>MCQs (MULTIPLE CHOICE QUESTIONS)>Q 75

Given that $\sin \alpha =\frac{1}{2}$ and $\cos \beta =\frac{1}{2}$, then the value of $\alpha +\beta$ is: