Question

see the attached file and answer it for me ​

Answer 1

MATE

YOUR SOLUTION IS IN ATTACHED PICTURE ☺️

Answer 2

Answer:

2 tanx sec^2 x

Step-by-step explanation:

1 ). Refer the attached picture.

Formulae used :

• sin( A - B ) = sinA cosB - cosA sinB
• Here, sin { ( x + h) - x} = sin ( x + h) cos x - cos( x + h) sin x
• A = ( x + h ), B = x
• Also, lim( h-> 0 ) sin h / h = 1

2. 2nd Image : Without using 1st principle.