Triangle DEF is right-angled at E

MATHEMATICS · Multi-part · CBSE · Mathematics · Introduction to Trigonometry · Introduction to Trigonometry

Problem

Triangle DEF is right-angled at E. The lengths of the sides are DE = 6 cm, EF = 8 cm and DF = 10 cm. (i) Find

\tan D

. (ii) Find

\frac{\text{sin }D}{\text{cos }D}

and compare your answer with part (i). Comment on what you observe. (iii) Calculate

\text{sin }F

and

\text{cos }F

, showing all working.