sec²60° – 1 = ?

sec² 60° – 1 = (1/cos² 60°) – 1

= [1/(1/2)²] – 1

= [1/(1/4)] – 1

= 4 – 1

= 3

If x tan 45° cos 60° = sin 60° cot 60° then x = ?

If tan²45° – cos²30° = x sin 45° cos 45° then x = ?

(cos 0° + sin 30° + sin 45°) (sin 90° + cos 60° – cos 45°) = ?

sin² 30° + 4 cot² 45° – sec² 60° = ?

sec260° – 1 = ?