Question

Cos (450 - θ) - sin (450 + θ) =

Answer 1

written in reverse for my convenience

= - sin (45 + θ) + cos (45 - θ)

= - (sin 45.cos θ + cos 45.sin θ) +( cos 45.cos θ + sin 45.sin θ )

=- sin 45.cos θ - cos 45.sin θ + cos 45.cos θ + sin 45.sin θ

= - (sin 45.cos θ - sin 45.sin θ) - (cos 45.sin θ - cos 45.cos θ)

= - sin 45(cos θ - sin θ) + cos 45(cos θ - sin θ)

= (cos 45 - sin 45) (cos θ - sin θ)

= 0 (cos θ - sin θ)

= 0 .....

follow me dear for your future doubts..❤️❤️✌️

Answer 2

Answer:

$\huge\bigstar\sf\purple{0:}$