Question

Find the value of tan²42-cosec²48

Answer 1

Step-by-step explanation:

tan^2 (90-48) - cosec^2 (90-42)

sec^2 48 - cot^2 42

I hope this will help you

Answer 2

Answer:

since

48°+42°=90°

48°=90°-42°

L.H.S

cosec²48°-tan²42°

cosec²(90°-42°)-tan²42°

sec²42°-tan²42°

1