Question

sin 54°- cos 36°, evaluate​

Answer 1

Answer:

answer is 0

explanation

sin54°-cos36°

= as we know 54°and 36° are complementary angles i.e. 54°+36° = 90°

so we can write sin54° as cos (90°-54°)

cos (90°-54°) - cos36°

=cos36°-cos36°

=0