cos alpha + sin alpha = 2 , find the value of cos ^8 alpha + sin ^ 8 alpha
achu , 7 Years ago
Grade 11
Trigonometry> cos alpha + sin alpha = 2 , find the valu...
1 Answers
Nitin
Last Activity: 7 Years ago
I think the ans is 17/8
square the equation value of sin a*cos a is 3/2
cos8a+sin8a can be written as
cos2a+sin2a]2 – 2 sin2 a*cos2 a]2- 2sin4 a*cos4 a
Now put the value you will get 17/8
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