Question

is tan× tan - sin ×sin =tan ×tan× sin ×sin

Answer 1

Yes it is absolutely correct...

Answer 2

as we know that

tan²∅ = sin²∅/cos²∅

and

sin²∅ + cos²∅ = 1

sin²∅ = 1 - cos²∅

following this we can solve LHS to get RHS!!

[ for solution refer to the attachment ]