Introduction to...

If $$\sin\theta = \dfrac{6}{10}$$ and $$\theta$$ is acute, what is the value of $$\sec\theta$$?

What is the meaning of trigonometry in Greek language?

If $$\cos\theta = \dfrac{12}{13}$$ and $$\theta$$ is acute, what is the value of $$\text{cosec}\,\theta$$?

If $$\sin \theta = \dfrac{5}{13}$$ and $$\theta$$ is acute, what is the value of $$\sec \theta$$?

In the 5th century who created the table of chords with increasing 1 degree?

If $$\cos\theta = \dfrac{8}{10}$$ and $$\theta$$ is acute, what is the value of $$\text{cosec}\,\theta$$?

If $$\cos\theta = \dfrac{14}{4}$$ and $$\sin\theta$$ $$=$$ $$\dfrac{8}{3}$$, what is the value of $$\cot\theta$$?

If $$\cos\theta = \dfrac{2}{21}$$ and $$\sin\theta = \dfrac{6}{7}$$, what is the value of $$\tan\theta$$?

Choose the correct option. Justify your choice
$$\displaystyle \left( 1+\tan { \theta +\sec { \theta  }  }  \right) \left( 1+\cot { \theta  } -\text{cosec }\theta  \right) =$$

Choose the correct option and justify your choice :
$$\displaystyle \frac { 2\tan { { 30 }^{ \circ  } }  }{ 1-{ \tan }^{ 2 }{ 30 }^{ \circ  } } =$$