Question

find the value of (sin theta+costheta)^²+(cos theta + sin theta )^²​

Answer 1

Answer:

Here is your answer dear

Answer 2

Let theta=∅

=(sin∅ + cos∅)²+(cos∅+sin∅)²

=(sin∅)²+(cos∅)²+2×sin∅×cos∅ + (cos∅)²+(sin∅)²+2×cos∅×sin∅

=sin²∅+cos²∅+2sin∅cos∅+cos²∅+sin²∅+2cos∅sin∅

=1 + 1+4sin∅cos∅

=2+2sin∅cos∅