Question

(sin 80° + cos 10º) (sin 80°-cos 10°) find velue.​

Answer 1

Answer:

0

Step-by-step explanation:

=(sin 80+cos10)(sin80-cos10)

=(sin80+cos10)(sin80-sin(90-10))

=(sin80+cos10)(sin80-sin80)

=(sin80+cos10)(0)

=0