10_mathematics_introduction_to_trigonometry_03.pdf
TRANSCRIPT
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CLASS 10 Mathematics (Introduction to Trigonometry )
1. If ( )tan 2 cot 6 = + the value of is(a) 28 (b) 29 (c) 27 (d) 30
[1]
2. The value of sin60 . Cos30 + sin30 . Cos60
(a) 1 (b) 2 (c) 4 (d) 3
[1]
3. If tan A=
4,
3than Sin A is equal to
(a) 43
(b) 45
(c) 54
(d) 14
[1]
4. The value of tan 48 . tan 23 . tan 42 . Tan67 is
(a) 1 (b) 2 (c) 3 (d) 4
[1]
5. Evaluate
2 22sin 47 cos 43 4cos 45
cos 43 sin 47
+
[2]
6. Prove ( )( )( )21 tan 1 sin 1 sin 1 + + = [2] 7. Prove 4 2 4 2sec tan tanSec A A A A = + [2]
8. Prove ( ) ( )2 2 2 2cos cos sec 7 tan cotSinA ecA A A A A+ + + = + + [2]
9. Evaluate
cos 70 cos55 .cos 35sin 20 tan 5 . tan 25 .tan 45 .tan 65 .tan85
ec +
[3]
10. If
cos cos
cos sinm and n = = show that ( )2 2 2 2cosm n n+ =
[3]