CBSE Guess > Papers > Important Questions > Class X > 2010 > Maths > Mathematics By Mr. Sanjeev Kumar CBSE CLASS X Q. 1. If sin A = ¾ . Find cos A and tan A. Q. 2. In triangle ABC, right angle At B. if tan A = 1/√3 find the values of the following sin A cos C + cos A sin C Q. 3. If tan (A+B) = √3 and tan (A – B) = 1/√3. Find the value of A and B. Q. 4. If tan 2A = cot (A – 180), where 2A is an acute angle. Find the value of A. Q. 5. If A,B and C are interior angles of the triangle ABC, then show that Sin {(B+C)/2} = cos A/2 Q. 6. prove the following identity Q. 7. (sin A + cosecA) 2 + (cos A + sec A) 2 = 7 + tan 2A + cot 2A .prove it. Q. 8. ( cosec A – sin A ) ( sec A – cos A) = 1/ ( tan A + cot A) Q. 9. prove that Q. 10. Express the ratios cos A, tan A and sec A in the terms of sin A.
Paper By Mr. Sanjeev Kumar |
