Question

evaluate : sin 50 /cos 40 + cosec 40 / sec 50 - 4 cos 50 cosec 40

Answer 1

Answer:

cos(90-50)/cos40+sec(90-40)/sec 50-4cos50*1/sin40

cos(90-50)/cos40+sec(90-40)/sec 50-4cos50*1/(cos90-40)

cos40/cos40+sec50/sec 50-4cos50/cos50

1+1-4

-2