Question

prove that tan48 x tan16 x tan 42 x tan74=1

Answer 1

Step-by-step explanation:

tan 48 * cot 74 *cot 48 *tan74=1

Answer 2

Answer:

Step-by-step explanation:

an 48 tan 16 tan 42 tan 74=1

LHS = cot(90-48). tan 16. tan 42 . cot(90-74)

= cot 42. tan 16. tan 42 . tan 16

= cot 42. tan 42. cot 16 . tan 16

= 1× 1

= 1

LHS=RHS