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hoose
2-3
then evaluate
13 tane
then evaluate
sin cose
7
14. If sin a then prove that (3cos - Acos)
(4 sin - 3cos e)
15. If 3000 - 2 then prove that
(2 sin 8 + 6 cos 0)
17
3 - 4 sine 3 tane
16. Il seco then prove that
4 cos 0-3 1-3 tan o
17. If tan e then prove that
(1 - sin + cos 0) 3
21
(1 + sin cos ) 7
coseco + sece
18. If tan 0
that
cosec e- sec
then prove
7
7
3
19. If sin e
(coseco - coto
then prove that
sex 0-1
20. If 3tan A=4 then prove that
sec A- cosec A
1-sin A
V sec A+ cosec A 7
V1+cos A
1
22
15
(1 + sin 0) (1 - sin o)
21. If coto then evaluate
8
(1 + cos 0)(1-сos 0)
22. In a ABC, if ZB = 90° and tan A=1 then prove that 2 sin
23. In the given figure, ABCD is a rectangle in which
8
diag. AC = 17 cm, ZBCA = 8 and sin 0
17
Find (i) the area of rect. ABCD,
(ii) the perimeter of rect. ABCD. [CBSE 2014)
24. If x= cosec A+ cos A and y = cosec A-cos A then prove
2
X-Y
x+y
2​

Answer 1

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