Question

i sin 25° cos 65° + cos 25° sin 65°​

Answer 1

Step-by-step explanation:

sin 25° cos 65° + cos 25° sin 65°

$\huge\underline\mathfrak\orange{Solution}$

= sin 25° cos (90° – 25°) + cos 25° sin (90° – 25°) = sin 25° sin 25° + cos 25° + cos 25°

= sin2 25° + cos2 25°

• = 1. [∵ cos2 θ + sin2 θ = 1]