Question

Question no. 5..plz hlp me

Answer 1

cos theta = 1/2 , sin (fi) = 1/2
Theta = cos inverse (1/2)
we know that cos 60 = 1/2..Hence theta = 60

Similarly sin 30 = 1/2..Hence fi = 30

Theta+fi = 60+30 =90
Hope this helps