@?trigonometry

See Also [[Further Maths - Radians]]S Flashcards What is the small angle approximation for $\sin \theta$ and $\tan \theta$?? $$ \sin \theta \approx \tan \theta \approx \theta $$ What is the small angle approximation for $\cos \theta$?? $$ 1 - \frac{\theta^2}{2} $$ What is $$\frac{\tan 2\theta}{\sin \theta}$$ for $\theta \approx 0$?? $$ 2 $$ Backlinks [[Maths - Syllabus]]S Metadata date: 2021-11-09 15:30 tags: - '@?public' - '@?

What is $\csc\theta$?? $$ \frac{1}{\sin\theta} $$ What is $\sec\theta$?? $$ \frac{1}{\cos\theta} $$ What is $\cot\theta$?? $$ \frac{1}{\tan\theta} $$ What is $\csc\theta$ in terms of triangle sides?? $$ \frac{\text{hyp}}{\text{opp}} $$ What is $\sec\theta$ in terms of triangle sides?? $$ \frac{\text{hyp}}{\text{adj}} $$ What is $\cot\theta$ in terms of triangle sides?? $$ \frac{\text{adj}}{\text{opp}} $$ 2021-02-22 $$\cos^2 x + \sin^2 x = 1$$ What do you get if you divide both sides by $\cos^2 x$?? $$ 1 + \tan^2 x = \sec^2 x $$

Degrees What is $\sin 0^{\circ}$?? $$ 0 $$ What is $\sin 30^{\circ}$?? $$ \frac{1}{2} $$ What is $\sin 45^{\circ}$?? $$ \frac{\sqrt{2}}{2} $$ What is $\sin 60^{\circ}$?? $$ \frac{\sqrt{3}}{2} $$ What is $\sin 90^{\circ}$?? $$ 1 $$ What is $\cos 0^{\circ}$?? $$ 1 $$ What is $\cos 30^{\circ}$?? $$ \frac{\sqrt{3}}{2} $$ What is $\cos 45^{\circ}$?? $$ \frac{\sqrt{2}}{2} $$ What is $\cos 60^{\circ}$?? $$ \frac{1}{2} $$ What is $\cos 90^{\circ}$?? $$ 0 $$ What is $\tan 0^{\circ}$?? $$ 0 $$