Question

★ CONTENT QUALITY SUPPORT REQUIRED ★

★ STANDARD QUESTION 27 ★

The answer with highest efficiency will get marked THE Brainliest , And will be offered an special invitation card

Question is -

Evaluate the value of expression -
$\sqrt{2 + \sqrt{2 + \sqrt{2 + 2cos8 \alpha } } }$
0 < α < π / 16

A. ) 2Cosecα
B.) 4Tanα
C.) 2Cosα
D.) 8Sinα


This question needs a perfect answer ; and it doesn't support lazy ones ! Take care

Answer 1

formulas used here are cos(2a) = (cos(a))^2 - (sin(a))^2
1 - (sin(a))^2 = (cos(a))^2