Subject
Quantitative Aptitude
Topic
Miscellaneous
If cos A + cos2A = 1, then the value of the expression (sin2A + sin4A) is–
If cos A + cos2A = 1, then the value of the expression (sin2A + sin4A) is–
ক)
1খ)
1/2গ)
2ঘ)
3Explanation
দেওয়া আছে, cos A + cos 2 A = 1 বা,cos A = 1 – cos 2 A বা, cos A = sin 2 A [ যেহেতু 1 – cos 2 A=sin 2 A ] প্রদত্ত রাশি = sin 2 A + sin 4 A = sin 2 A + (sin 2 A) 2 = cos A + cos 2 A = 1 [ cos A + cos 2 A = 1 দেওয়া আছে ]Related questions
In a zoo, each pigeon has 2 legs, and each rabbit has 4 legs. The head count of the two species together is 12, and the leg count is How many pigeons and how many rabbits are there in the zoo?Mohit purchased 25 kg of sugar at Rs. 30 per kg and mixed it with 15 kg of sugar at Rs. 36 per kg. At what rate should he sell the mixture to gain 10%.The day that will come 3 days aftertomorrowwill be Saturday. What was the day two days beforeYesterday?Robi takes 3 minutes to inspect a car and Sashi takes 4 minutes to inspect a car. If they both start inspecting different cars at 8:30 AM, what would be the ratio of the number of cars inspected by Robi and Sashi by 8:54 AM of the same day?729 litres of a mixture contains sprit and water in the ratio 7 : 2. How much water is to be added to get a new mixture containing spirit and water in the ratio 7 : 3?How many different six-digit numbers can be formed using all of the following digits: 3, 3, 4, 4, 4, 5?60 kg of certain variety rice at Rs 32 per kg is mixed with 48 kg of another variety of rice and the mixture is sold at the average price of Rs 28 per kg if there be no profit and no loss due to the new selling price, what is the price of the second variety of rice?At a party, everyone shook hands with everybody else. There were 66 handshakes. How many people were there in the party?