sin² 30+ cos² 30 1+ tan² 45

Which of the following is equal to expression 2(sin 30°) – tan 45°?

Evaluate the following: 2 tan2 45° + cos2 30° – sin2 60°

sin 60° cos 30° + sin 30° cos 60°

If  cos 40 sin 30x    , find the value of x

[⅝ sec² 60°-tan² 60°+cos² 45°] is equal to