Important Question of Class 10 Math

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12 September 2020 

1. If sinθ = 1/3, the then find the value of  (9 cot2 θ + 9) is 

Solution 1


Solution 2
                                      

Solution 3 - 


2. Which of the following can be the nth term of an AP? 3n + 1, 2n2 + 3, n3 + n. Give reasons.

Hint-  put n=1,2,3 respectively in all the three equation then see which follow the rule of AP 


3. If (x – 2) is a factor of x3 +ax2 +bx+16 and b = 4a, then find the values of a and b.




4. Find the sum of all two-digit natural numbers which are divisible by 7

Solution - 1 

Solution- 2 



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