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If a=2^2×3^x, b=2^2×3×5, c=2^2×3×7 and . . .

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Question : If a=2²×3 x , b=2²×3×5, c=2²×3×7 and LCM (a, b, c) = 3780, then x is equal to (A) 1 (B) 2 (C) 3 (D) 0 CBSE Sample Question Pa...

If a=5^13×7, b=3×5^25×7^6, c=5^n×7^4 . . .

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Question :  If a=5 1 3 ×7, b=3×5 25 ×7 6 , c=5 n ×7 4 and LCM (a,b,c) = 3×5 31 ×7 6 , then n=? (a) 31 (b) 25 (c) 13 (d) 34 Doubt by Mus...

Prove that sinA(1+tanA)+cosA(1+cotA) . . .

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Question : Prove that sinA(1+tanA)+cosA(1+cotA) = secA+cosecA Doubt by Afifa Solution : OR sinA(1+tanA)+cosA(1+cotA) = secA+cosecA OR sinA(...

In ΔABC, ∠ACB=90° and DCEF is a square . . .

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Question :  In ΔABC, ∠ACB=90° and DCEF is a square, as shown in figure. Prove that DE²=AD×BF Doubt by Afifa Solution :  DCEF is a square.  D...

If the ratio of the sum of the first n terms of two A.P.s is (7n+1) . . .

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Question :  If the ratio of the sum of the first n terms of two A.P.s is (7n+1):(4n+27), then find the ratio of their 9th terms. Doubt by ...

Divide 32 into four parts which are in A.P. such that the product

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Question : Divide 32 into four parts which are in A.P. such that the product of extremes is to the product of means is 7:15. Doubt by Shaur...

If ΔABC~ΔPQR in which AB=6cm . . .

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Question :   If ΔABC~ΔPQR in which AB=6cm, BC=4cm, AC=8cm and PR=6 cm, then find the length of (PQ+QR). Doubt by Shaurya and Prateek Solutio...

Assertion (A): If cosA+cos2A=1, then sin2A+sin4A . . .

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Question : Assertion (A): If cosA+cos²A=1, then sin²A+sin⁴A=1 Reason (R): sin²A+cos²A=1 Choose the correct option: (A)Both assertion (A) an...

If 2sin5x=√3, 0°<=x<=90°, then x is equal to . . .

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Question : If 2sin5x=√3, 0°≤x≤90°, then x is equal to  (A) 10° (B) 12° (C) 20° (D) 50° CBSE Sample Question Paper 2026 Solution :  2sin5x=√...

If secθ+tanθ=x, then secθ-tanθ will be . . .

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Question : If secθ+tanθ=x, then secθ-tanθ will be (A) x (B) x² (C) 2/x (D) 1/x CBSE Sample Question Paper 2026 Solution :   secθ+tanθ=x Rec...