Tamil Nadu Board Solutions for Chapter: Trigonometry, Exercise 8: Exercise

The value of $\frac{1-{\tan }^2 45°}{1+{\tan }^2 45°}$ is

The value of $cosec\left(70°+\theta \right)-\sec \left(20°-\theta \right)+\tan \left(65°+\theta \right)-\cot \left(25°-\theta \right)$ is

The value of $\tan 1° \tan 2° \tan 3° \dots \tan 89°$ is

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

Evaluate:

$\sin {30}^{\circ }+\cos {30}^{\circ }$

Evaluate:

$\tan {60}^{\circ } \cot {60}^{\circ }$

Evaluate:

$\frac{\tan {45}^{\circ }}{\tan {30}^{\circ }+\tan {60}^{\circ }}$

Evaluate:

${\sin }^2{45}^{\circ }+{\cos }^2{45}^{\circ }$