show that tan 48 degree and tan 23 degree and tan 42 degree and tan 67degree equal to 1
Answers
Answered by
2
Answer:
use formula: tan (90 - a) = cot a
Step-by-step explanation:
tan 48 x tan 23 x tan 42 x tan 67 = 1
LHS
= tan 48 x tan 42 x tan 67 x tan 23
(or)
= tan 48 x tan (90 - 48) x tan 67 x tan (90 - 23)
= tan 48 x cot 48 x tan 67 x cot 67
[tan = 1/cot]
= 1 x 1
= 1
if you liked it mark me as brainliest!!
Similar questions