Question

sin 70/cos 20 + cosec 36 /sec 54 - 2 cos 43 cosec 47​

Answer 1

Answer:

ans is zero.................................

Answer 2

Answer:

0

Step-by-step explanation:

sin(90-20)/cos20+cosec(90-54)/sec54 -2cos(90-47)cosec47

{since sin(90-@)=cos@

cos(90-@)=sin@.

cosec(90-@)=sec@

cosec@=1/sin@}

cos20/cos20+sec54/sec54-2sin47/sin47

1+1-2

2-2

0