Question

cos(270+theeta)=
A COS THEETA
B SIN THEETA
C -COS THEETA
D -SIN THEETA​

Answer 1

Answer:

cos(270+theeta)=

A COS THEETA

B SIN THEETA

C -COS THEETA

D -SIN THEETA

→D -SIN THEETA

Answer 2

Answer:

B) Sin Theta

if we take theta=90°

cos(270+90)=cos360= 1

and sin90 is also 1

And there is also one Trigonometric Identity:-

cos(270°+theta)=sintheta.

So, option B is correct.