Question

express cot75+cosec75 in terms of trigonometric ratios of angles between 0 and 30

Answer 1

cot 75= cot(90-15)=tan15

cosec75= cosec(90-15)=sec15

so cot75+cosec75 = tan15+sec15

Answer 2

Answer:

cot 75°+ cosec 75°

[ tan (90°-theta)]

[sec (90°- theta)]

cot 75° + cosec75°= tan(90°-75°) + sec(90°-75°)

= tan 15°. + sec 15°