Question

if tan a = root 3 finf the value of 1-cos^2a/2-sin^2a​

Answer 1

Answer:

tanA = √3

tanA = √3/1 = perpendicular /Base

By Using Pythagoras theorem

H² = P² + B²

H² = (√3)² + (1)²

H² = 3 + 1

H² = 4

H = √4 = √2×2

H = 2

finding the Values

1 - cos²A /2- sin² A

1 - (1/2 )² / 2 - (√3/2)²

1 - 1/4 / 2 - 3/4

4-1/4 / 8-3/4

3/4 / 5/4

3/4 × 4/5

Cut the value of same as 4

3/5 is the answer in your question