looks like you need to review your basic triangles:
sin 60°/cos^2 45° - cot 30° + 15cos 90°
√3/2 / 1/2 - √3 + 15*0
√3 - √3
0
find the value of sin 60degree/cos*cos 45degree-
Cot 30degree+15cos90degree
2 answers
Sin(theta-30digree)=1/2