Question

Use an identity to write the expression as a single trigonometric function. 1 - cos 86° sin 86° 1 o cos 86° sin 86° 11 (Simplify your answer.)

Answer 1

ارابيا لما use the following identity, na 1-cosa tan Sina Proof in RHS :- en 7 2 = sinu COS를 1-LOS 2 + CO2 2 1 - Cox Si+cosx Si-cosx Si-cosx Sitcose JT - COSE (1-cosx)(1 - cosx) N{1+ cosx)(1 - cosx Vl-cosx)? Si- cos²x Sc-cosx)? ✓sinx =LHS Proved こ 1- COS Sint

Here x=86° o J- cos 86° sin 86° tan/86 2 **878 tan(43°