Question

show that cos35 =sin55

Answer 1

LHS=
cosA =sin(90-A)
cos35=sin(90-35)
=RHS
HENCE PROVED

Answer 2

to prove : cos35 = sin55

proof :

from lhs ,

cos35°

but , we know that cos Ф = sin(90-Ф)

hence, cos35° can also be written as sin(90°-35°)

⇒ sin(90-35) = sin 55

hence ,

LHS = RHS

sin55 = sin55

hope my answer helps you :)