Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesFundamental trigonometrical ratios and functions, Trigonometrical ratio of allied angles
EasyThe value of $\cos (270^\circ + \theta )\cos (90^\circ - \theta ) - \sin (270^\circ - \theta )\cos \theta $ is
- A$0$
- B$-1$
- C$0.5$
- D$1$
Explore More
Similar Questions
If $\frac{\cos A}{3} = \frac{\cos B}{4} = \frac{1}{5}$, $-\frac{\pi}{2} < A < 0$, and $-\frac{\pi}{2} < B < 0$, then the value of $2 \sin A + 4 \sin B$ is
MediumWBJEE 2010
View SolutionIf $\cos x = -\frac{3}{5}$ and $x$ lies in the third quadrant,find the values of the other five trigonometric functions.
Medium
View SolutionThe value of $\tan 1^\circ \tan 2^\circ \tan 3^\circ \dots \tan 89^\circ$ is equal to
If $x = \sin 130^\circ \cos 80^\circ$,$y = \sin 80^\circ \cos 130^\circ$,and $z = 1 + xy$,which one of the following is true?
Easy
View Solution$\operatorname{cosec} 15^{\circ} + \sec 15^{\circ}$ is equal to :
DifficultTS EAMCET 2006
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo