180^(0)

sin225^(@)=sin(180^(@)+45^(@))=-sin45^(@)=-(1)/(sqrt(2)) cos246^(@)=cos(180^(@)+66^(@))=-cos66^(@)=-0.4067 tan211^(@)=tan(180^(@)+31^(@))=tan31^(@)=0.6009 .

Solve : sin 2theta+sin 4theta+sin6 theta=0,(-180^(@)le theta<= 180^(@))

Prove that cos theta + "sin " (270^(@) +theta) - "sin "(270^(@) -theta) + "cos " (180^(@) +theta) =0

When angles between principal sections of two nicols are 0^(@) and 180^(@) , they are referred to as……….. .

If sintheta=(1)/(2)where 0^(@)lethetale180^(@), "then the possibel value of " theta " are "____________.

Prove that 2sin2^(0)+4sin4^(0)+6sin6^(0)+......+180sin180^(@)=90cot1^(0)

cos A + sin (270 ^ (@) + A) -sin (270 ^ (@) - A) + cos (180 ^ (@) + A) = 0

Simplify the following using suitable property. 166xx180xx0

Give the stability position of bar magnet for theta = 0^@, 180^@.