Question

show that tan 48° tan 23° tan 42° tan 67° =1​

Answer 1

Step-by-step explanation:

tan(90-42) tan(90 -67) tan42 tan 67

cot(42) cot(67) tan 42 tan 67

tan (90-x) = cot x ---->Formula

we know that tan x cot = 1

so 1x1 = 1

Hence proved

Answer 2

Answer:

please refer the attachment given above