Question
If (sinθ+cosθ)/(sinθ-cosθ) = 2,
then the value of sin4 θ isSolution
(sinθ+cosθ)/(sinθ-cosθ) = 2 By applying Componendo and Dividendo (sinθ+cosθ+sinθ-cosθ)/(sinθ+cosθ-sinθ+cosθ) = (2+1)/(2-1) 2sinθ/2cosθ = 3/1 tanθ = 3/1 tanθ = Perpendicular/Base = 3/1 
sin4 θ = (3/√10)⁴ = 81/100
- A woman uses 25% of her salary for house rent, then spends 20% of the remaining amount on grocery, and 30% of the rest on transportation. She manages to sa...
If the first and second letter of each word are interchanged and words arranged in alphabetical order from left to right then which of the following is ...
- Employee P manufactures 24 bottles an hour, and Employee Q manufactures 16 bottles per hour. If 20% of the bottles are damaged, how much time is required t...
Statements:
Some drives are laptops.
All laptops are keyboards.
No keyboard is a computer.
Conclusions:
I. Some...
Select the option in which the numbers are related in the same way as are the numbers of the following sets.
(63, 7, 16)
(68, 4, 21)
- In a classroom, students like three different subjects: Math, Science and English in the ratio 5:4:11. If 364 students like Science, then how many students...
In the question below, a situation is given, followed by statements that may or may not be possible reasons for the situation. Select the option that b...
- 12 years ago, the ratio of the ages of Meena and Riya was 7:11. If Riya’s current age is 40% more than Meena’s current age, then find the sum of their ...
Combination of ages of which pair is maximum?
There are five magazine M, N, O, P, and Q. Magazine O lies above P, magazine Q is below M, P is above M and N is below Q. Which magazine is at the bottom?
