Question

answer please it fast and i will give brainlist answer and don't scam or i will report them

Answer 1

Answer:

0

Step by step explanation:

tan (theta)=1

=>tan (theta)=tan 45°

=>theta=45°

sin (phi)=1/root 2

=>sin (phi)=sin 45°

=>phi=45°

cos(theta+ phi)

=cos(45°+45°)

=cos 90°

=0

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