Question

prove the identites: trigonometry maths ​

Answer 1

Answer:

your answer is in attachment

Step-by-step explanation:

I hope that it will help you

Answer 2

use the formula

${(a + b) }^{2} = {a}^{2} + {b}^{2} + 2ab$

${(a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab$

then it simply prove