Question

if an = n2 _ 3n find a10​

Answer 1

Answer:

please follow my channel

Step-by-step explanation:

Taking LHS:

sin 105° + cos 105°

cos (90° - 105°) + cos 105°

cos 15° + cos 105°

cos C + cos D = 2(cos(C+D)/2)(cos(C-D)/2)

2cos(120°/2)cos(90°/2)

2cos60°cos45°

2(1/2)cos45°

cos45°

= RHS