" (iii) "sin50^(@)+cos40^(@)=2sin(.........)

Answer the question no 1 to 5 from he options : (Each of 1 mark) |{:(sin40^@,-cos40^@),(sin50^@,cos50^@):}|="........."

(sin(70^(@))+cos(40^(@)))/(cos(70^(@))+sin(40^(@)))= ..........

if sin50^(@)=0.766, then sec40^(@)=

(sin70^(@)+cos40^(@))/(cos70^(@)+sin40^(@))

sin^(2)50^@+cos^(2)50^@=?

cos20^(@)cos40^(@)-sin5^(@)sin25^(@)=

(2cos40^(@)-cos20^(@))/(sin20^(@))

(2cos40^(@)-cos20^(@))/(sin20^(@))

Evaluate: sec 50^(@) sin 40^(@)+cos 40^(@) cosec 50^(@) .

Express cos 320^(@) as a function of an angle between 0^(@) and 90^(@) I. cos40^(@) II. sin50^(@) III. cos50^(@)