Question

Give me some high level questions of mathematics​

Answer 1

Answer:

solve this question ok

Answer 2

Answer:

these are some questions which i found hard ..

Step-by-step explanation:

1..If A, B and C are interior angles of a triangle ABC, then show that sin [(B + C)/2] = cos A/2.

2.. Prove the identities:

(i) √[1 + sinA/1 – sinA] = sec A + tan A

(ii) (1 + tan2A/1 + cot2A) = (1 – tan A/1 – cot A)2 = tan2A

3..In a quad. ABCD ANGLE A + ANGLE D =90 DEGREE. THEN PROVE THAT AC^2 + BD^2=BC^2 + AD^2.

4..If Sn denotes the sum of n terms of an AP whose common difference is d and 1st term is a. Find Sn – 2Sn – 1 + Sn – 2 .