Question

if A: 15, evaluate : 4 COS 2 A
sin 4 A
TAN 3 A​

Answer 1

Answer:

Given, x=15∘

Given, x=15∘Now,  

Given, x=15∘Now,  4cos2xsin4xtan3x−1

Given, x=15∘Now,  4cos2xsin4xtan3x−1=4(cos30)(sin60)(tan45)−1

Given, x=15∘Now,  4cos2xsin4xtan3x−1=4(cos30)(sin60)(tan45)−1=4⋅23⋅23⋅1−1

Given, x=15∘Now,  4cos2xsin4xtan3x−1=4(cos30)(sin60)(tan45)−1=4⋅23⋅23⋅1−1=3−1 =2