Question

URGENT PLEASE HELP

c) (1-cos0) (1+1/cos0) simplifies to cos^2 0

d) sin0/1+cos0 + 1+cos0/sin0 simplifies to 2/sin0

@mathslover @MARC_ @master50777

Answer 1

please note that:
\[(1-\cos \theta)\left( 1+\frac{ 1 }{ \cos \theta }\right)=1+\frac{ 1 }{ \cos \theta }-\cos \theta-1=...\]
please continue.
And:
\[\frac{ \sin \theta }{ 1+ \cos \theta }+\frac{ 1+ \cos \theta }{ \sin \theta }=\]
\[=\frac{ (\sin \theta)^{2}+(\cos \theta+1) ^{2}}{ \sin \theta (1+\cos \theta) }=\]
\[=\frac{ (\sin \theta)^{2}+(\cos \theta)^{2}+2 \cos \theta +1 }{ \sin \theta(1+\cos \theta) }=...\]
please continue