Question

tan 48° tan 16° tan 42° tan 74 °
( )

a) 1 b) 0 c) –1 d) 2​

Answer 1

Answer:

tan 48=tan(90-42)

tan 48=cot42 [tan(90-x)=cot x

tan 74=tan(90-16)

tan 74=cot 16

cot 48×tan48×tan16×cot 16

tan x×cot x=1

there for total product is "1"

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Answer 2

Answer:

answer. (A)

Step-by-step explanation:

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