Question

15. If tano + seco = x, show that sino
2
x2 – 1
x2 + 1
16. If sinA – cosA= 0, show that cosecA==v2
17. If sino + cose =^2 coso, prove that cose – sino =v2 sine.
18. If tano + sin0 = x and tane – sino = y, show that x2 - y2 = 4 Nxy
19. If 1 + sin?A= 3 sinA. COSA then prove that, tanA = 1 and 111
20. If cos40 + cos²0 = 1 show that,
(i) tan*+ tan²0= 1
(ii) coto - cot0 = 1
Speedy Optional Maths - Book 9
106​

Answer 1

Step-by-step explanation:

Republic Day is a national holiday in India. It honours the date on which the Constitution of India came into effect on 26 January 1950 replacing the Government of India Act as the governing document of India and thus, turning the nation into a newly formed republic.