Question
Which pioneer scientist used radio waves to transmit
signals over distances of several kilometres in the 1890s?Solution
Guglielmo Marconi, the pioneer scientist, used radio waves to transmit signals over several kilometers in the 1890s. He is renowned for his groundbreaking work in the development of wireless telegraphy and radio communication. Marconi's experiments and innovations in the transmission and reception of radio waves paved the way for modern wireless communication technology and earned him the title of the father of radio.
If 8sin²x + 4cos²x − 6 = 0, then find the value of sinx, given that 0° < x < 90°.
- If X = 10°, find the value of:
cos²(3X) + sin²(6X) - tan²(3X) - Determine the value of following trigonometric expression:
If cos 2A = 3, then find cos A
cot 13Ëš Â
 cot 14˚  ...- Find the maximum value of (11sin A + 60cos A).
If sec(2A + B) = 2 and cos(A + B) = (1/√2) , find the value of {sec 2B + tan (A + B) } given that 0o < A, B < 90o
If cos3B = sin(0.5B + 6°), then find the measure of 'B'.
sin2 4˚ + sin2 6˚ + sin2 8˚ + sin2 10˚ + ……… + sin2 86˚ =?
Find the exact value of cos120°
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