Question
What is the maximum trial speed achieved by Chinaās
CR450 bullet train?Solution
Chinaās CR450 bullet train achieved a record 450 kmph during trial runs on the ShanghaiāChongqingāChengdu route, making it the fastest train in the world. Developed over five years, it completed nearly 6 lakh km of testing and features innovations such as a 15-metre nose cone and a 55-tonne weight reduction, improving energy efficiency and speed.
Simplify the following trigonometric expression:Ā
8 cos 40° cosec 50° ā 2 cot 30° cot 60°Ā
In triangle ABC, ā A - ā B = 16 ° , whereas ā A - ā C = 8 ° , find ā B.
if a sin 45 Ė = b cosec 60 Ė then find the value of aā“/bā“
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- Simplify the following trigonometric expression:
11 sin 42° sec 48° ā 7 tan 37° tan 53° If α means +, β means -, ɣ means x, Īø means Ć· then 30 Īø 10É£ 5α 10β20 is
If sec a + tan a = 3, find the value of sin a.Ā
If tan² 45°- cos² 60° x sin 45° cos 45° cot 30°, then find the value of 'x'.
- If sec A = 2, then what will be the value of sin² A?
- Simplify the following trigonometric expression:
15 cos 27° sec 63° ā 9 cot 61° tan 29°