Question

Express sin 75°+cos 65° in terms of trigonometric ratios of angles between 0° and 45°​

Answer 1

Step-by-step explanation:

sin 75° = cos ( 90° - 75°)

= cos 15°

cos 65° = sin (90° - 65°)

= sin 25°

Thus,

sin 75° + cos 65° = cos 15° + sin 25°