Question

The sum of first 7 terms of an A.P. is 7 and that of next 7 terins is 17. Find the
2. a)
progression.
b) Find the sum of first n-terms of the sequence, 7, 77, 777,
3. a)
a) | If sin 0 = 1, then find value of all other t-ratios for ( lying in the second quadrant.
b) Find the fourth term and middle term in the expansion of (x - 2y)^2
c) Using binomial theorem evaluate (99)5.
4. a) Prove that sina+sin 3.0
= tan 2.c.
COKO+cos3a
b) Prove by induction that 13 + 23 +33 +...+73
n (2+1)
c) Solve sin(2.c) + cos x = 0​

Answer 1

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