Question

(sin tita+cos tita)^2+(sin tita-cos tita)^2 Evaluate.​

Answer 1

Answer:

(sin@+cos@)²+(sin@-cos@)²

= sin²@+2sin@cos@+cos²@ + sin²@-2sin@cos@ + cos²@

=(sin²@+cos²@)+(2sin@cos@-2sin@cos@)+(sin²@+cos²@)

=1 + 0 + 1

= 2