Question -
Answer -
Given:
sin 67° + cos 75°
In term of sin as cos function and cos as sinfunction, it can be written as follows
sin 67° = sin (90° – 23°)
cos 75° = cos (90° – 15°)
= sin (90° – 23°) + cos (90° – 15°)
Now, simplify the above equation
= cos 23° + sin 15°
Therefore, sin 67° + cos 75° is also expressedas cos 23° + sin 15°