Question

18. In figure-1 PQ and AB are two arcs of concentric circles of radii 7 cm and
3.5 cm resp., with centre 0. If Z POQ = 30°, then find the area of shaded
region.
0
30°
Fig. - 1
19. A card is drawn at random from a well-shuffled pack of 52 cards. Find the
probability of getting a red king.
20. Two similar triangles ABC and PQR have their areas 25 cm2 and 49 cm2
respectively. If QR = 9.8 cm, find BC.
Section - B
Question numbers 21 to 26 carry 2 marks each.
21. Divide (2x2 - x + 3) by (2 - x) and write the quotient and the remainder.
22. Prove that: -
1 + sin
-= 2 sec20
1-sino
OR
Prove that:
1-tan-e
1+tande
= cos2e - sinae

Answer 1

Answer:

Step-by-step explanation:

q18 in attachment

q19.probability =Number of favourable outcome/ Number of possible outcomes

)p=2/52

=1/26

q20..

again in attachmnet

q21 u cant even divide,,, divide urself