Question

sin⁸ø-cos⁸ø/1-2sinøcosø=sin²ø-cos²ø​

Answer 1

Answer:

hope it will work for you ✌️

Step-by-step explanation:

cos⁴ø - sin⁴ø = 1/2

=>( cos²ø)² - (sin²ø)² = 1/2

=>(cos²ø - sin²ø)(cos²ø + sin²ø)=1/2

=>( cos²ø - sin²ø )×1 = 1/2

=> cos²ø - sin²ø = 1/2

=> cos2ø = 1/2

=> cos 2ø = cos 60°

=> 2ø = 60°

=> ø = 30°