Math, asked by pranu9599, 1 month ago

Sin55°×cos48°= cos35°×sin42°

Answers

Answered by llEmberMoonblissll
3

Answer:

.

Taking LHS = sin 55 ° cos 48°

We know that

cos θ = sin (90° - θ)

Here, θ = 48°

⇒ sin 55° sin (90° - 48°)

⇒ sin 55° sin 42°

We also know that

Sin θ = cos (90° - θ)

Here, θ = 55°

⇒ cos (90° - 55°) sin 42°

⇒ cos 35° sin 42° = RHS

Hence proved .

Similar questions