Board Exam Paper 2026 | Q. No. 9 | RBSE Class 10th Maths Model Paper 2026 | By Kuldeep Sir

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Chapter 8 Introduction to Trigonometry
00:00:00 In given right angle triangle ABC, the value of cos C is -(a) 3/5 (b) 4/5 (c) 5/3 (d) 5/4
00:00:30 if θ = 45° then the value of is- (a) ½ (b) √2 (c) 2 (d) 1
00:01:00 If sin 3x = 1, then value of x is- (a) 15° (b) 30° (c) 45° (d) 20°
00:01:30 If tan A = 1, then value of 2 sin A cos A is- (a) 1 (b) 2 (c) 3 (d) 4
00:02:00 sin 2A = 2 sin A is true, when A equals (a) 0° (b) 30° (c) 45° (d) 60°
00:02:30 Identities sec² θ - 1 = _____ .
00:03:00 The value of 2sin²60° cos60° is _______.
00:03:30 The value of 3 cos 30° – 4 cos 30° is _______ .
00:04:00 The value of cosec² 45° – cot² 30° is _________ .
00:04:30 The value of 4 cot² 45° – sec² 60° – sin² 30° _________ .
00:05:00 If 8 cot = 7, evaluate
00:05:30 Express the trigonometric ratio tan A and cos A in terms of sec A.
00:06:00 Evaluate: sin 60° sec 30° tan 45°.
00:06:30 Find value of
00:07:00 Find the value of √(1 - cos² θ) at θ = 30°.
00:07:30 In ΔOPQ, right angle at P, OP = 7 cm and OQ - PQ = 1 cm. Determine the value of sinQ and cosQ .
00:08:00 If tan(A + B) = √3 and tan(A - B) = 1/√3; 0° A + B 90°; A B, Find A and B.
00:08:30 In Δ PQR, right-angled at Q, PR + QR = 25 cm and PQ = 5 cm. Determine the values of sin P, cos P and tan P.
00:09:00 In Δ PQR, right-angled at Q (see Figure), PQ = 3 cm and PR = 6 cm. Determine ∠ QPR and ∠ PRQ.
00:09:30 Express the trigonometric ratio tan A and cos A in terms of sec A.
00:10:00 Prove that :