Question

please provide me answer​

Answer 1

Answer:

this is your proof with explaination

Answer 2

Used formulas :-

• (a - b)(a - b) = (a - b)²

• (a + b)(a - b) = a² - b²

• √a/b = √a/√b

• 1 - cos²A = sin²A

• a - b/c = a/c - b/c

• 1/sinA = cosecA

• cosA/sinA = cotA

More formulas :-

• sin²A + cos²A = 1

• sec²A - tan²A = 1

• cosec²A - cot²A = 1

• sin(A + B) = sinAcosB + cosAsinB

• sin(A - B) = sinAcosB - cosAsinB

• cos(A + B) = cosAcosB - sinAsinB

• cos(A - B) = cosAcosB + sinAsinB

• (a - b)² = a² + b² - 2ab

• (a + b)² = a² + b² + 2ab

• (a + b + c)² = a² + b² + c² + 2abc(ab + bc + ac)