Introduction to...

Given $$\tan \theta = 1,$$ which of the following is not equal to $$\tan$$ $$\theta\ ?$$

If $$\tan 5\theta . \tan4 \theta =1$$  then $$\theta =$$________.

$$\cos{{12}^{\circ}}-\sin{{78}^{\circ}}=$$

The value of $$\sin 60^{\circ} - \cos 30^{\circ}$$ is

If $$2\sin\theta-3\cos\theta=0$$ then $$\tan\theta$$=........ .

What is the value of $$\sin{45^{o}}+\cos{45^{o}}$$

From the given figure, AB =

If $$sin({ 90 }^{ 0 }-\theta )=\dfrac { 3 }{ 7 } $$, then $$cos\theta $$

$$sin{ 81 }^{ 0 }+tan{ 81 }^{ 0 }=.......$$

$$\tan {45^ \circ } =?$$