Question

please solve this ......​

Answer 1

Answer:

1. sin 60° = √3/2. 2 sin^60° = 2(√3/2)^2 = 2(3/4) = 3/2
2. cos 45° = 1/√2. 2(1/√2)^2 = 2(1/2) = 1.
3. sin^2A +. cos ^ 2A = 1
4. (1+tan^2 A) (1+sinA) (1-sinA).

= (sec^2A) (1-sin^A)

= (sec^2A) (cos^2A)

= (1/cos^2A) ( cos^2A)

= 1

Answer 2

Answer:

see the picture please