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Number of ordered pairs (a,b) for which `sin^(-1)(1+b+b^2+..oo)+cos^(-1)(a-a^2/3+a^4/9+..oo)=pi/2` is (A) 0 (B) 4 (C) 9 (D) Infinite

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RESONANCE DPP ENGLISH-JEE MAINS-All Questions
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  15. If m^2-n^2= 7, where m, n epsilon Z, then number of ordered pairs (m,...

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  16. Number of values of k for which the lines k x+y+1=0 x+k y+2=0 x+y...

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  17. Make the following expressions free from modulus sign: (x in R) |x^3...

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