Question
Which of the following is NOT an example of a noble
gas?ÂSolution
Noble gases belong to Group 18 of the periodic table and include helium, neon, argon, krypton, xenon, and radon. They are chemically inert, colorless, and odorless gases. Hydrogen, although a gas, is not a noble gas.Â
A 16-meter-long rope is stretched from the ground to the top of a house, forming a 30° angle with the ground. Determine the height of the house.
If sin3A = cos(5A-30°), then what is the value of A? Given that 3A is an acute angle.
Take θ = 450
If tan θ = (2/√5), then determine the value of cos2 θ
- If 2cosec 2  A – cot 2 A = 5 and 0 o < A < 90 o , then find the value of ‘A’.
If 2x = cosec @ and 4/x = cot @ then the value of 2(x ² - 1/x ² ) is
cot 4˚ x cot 47˚ x cot 42.3˚ x cot 43˚ x cot 47.7˚ x cot 86˚= ?
If tan θ + cot θ = 5, find the value of tan²θ + cot²θ.
If cot8A = tan(A+8Ëš), find the value of A? Given that 8A and A+8 are acute angles.
Find the value of sin 240 °
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