Question

Evaluate
1.Sin54-Cos36 ​

Answer 1

Answer:

sin 54 - cos 36 = sin (90-36) - cos 36

= cos 36 - cos 36

= 0

Answer 2

Answer:

as they are complementary angles

Step-by-step explanation:

sin(90-36)=sin 54

sin (90-36)=cos 36

so by the upper formula

so sin 54 - cos 36

cos 36-cos 36= 0