Question
Download Solution PDFThe sides of a triangle are m, n and
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Cosine Rule of Triangle:
The square of the length of any side of a given triangle is equal to the sum of the squares of the length of the other sides minus twice the product of the other two sides multiplied by the cosine of angle included between them.
Consider, a, b, and c are lengths of the side of a triangle ABC as shown, then;
Calculation:
Let m = n = 1 unit
Then,
Using cosine rule;
⇒ cos θ = -1/2
∴ θ = 120°
Now, the sum of the acute angles of the triangle = 180° - 120° = 60°
Last updated on May 30, 2025
->UPSC has released UPSC NDA 2 Notification on 28th May 2025 announcing the NDA 2 vacancies.
-> A total of 406 vacancies have been announced for NDA 2 Exam 2025.
->The NDA exam date 2025 has been announced for cycle 2. The written examination will be held on 14th September 2025.
-> Earlier, the UPSC NDA 1 Exam Result has been released on the official website.
-> The selection process for the NDA exam includes a Written Exam and SSB Interview.
-> Candidates who get successful selection under UPSC NDA will get a salary range between Rs. 15,600 to Rs. 39,100.
-> Candidates must go through the NDA previous year question paper. Attempting the NDA mock test is also essential.