Which of the following statements is FALSE regarding

Simplify the following trigonometric expression:
10 cos 71° sec 19° − 4 cot 62° tan 28°

If θ is an acute angle and sin θ + cosec θ = 2, then the value of ^sin2 θ + cosec² θ is:

Simplify the following trigonometric expression: 

15 cos 25° cosec 65° − 5 cot 80° cot 10°

What is the value of sin(B – C) cos(A – D) + sin(A – B) cos(C – D) + sin(C – A) cos(B – D)?

If 2x = cosec @ and 4/x = cot @ then the value of 2(x ² - 1/x ² ) is

tan 4˚ × tan 43˚ × tan 47˚ × tan 86˚ = ?

If cosec (2A + B) = (2/√3) and cosec (A + B) = √2, then determine the value of (4A - B).

From a point 50 meters away from the base of a tower, the angle of elevation of the top of the tower is 30°. Find the height of the tower.

(cos5°+sin5°)/(cos5°-sin5°) is equal to: