Math, asked by kuldeeprawat468, 1 year ago

cosa-sina=√2 sina find cosa+sina

Answers

Answered by sauravkrsharma23
0
cosa-sina=√2 sina
squaring both sides
(cosa-sina)²=(√2 sina)²
[(a-b)²=(a+b)²-4ab]
(cosa+sina)²-4cosa•sina=2sin²a
(cosa+sina)²=2sin²a+4cosa•sina
(cosa+sina)²=2sina(sina+cosa)
(cosa+sina)²/(sina+cosa)=2sina
(cosa+sina)=2sina
Similar questions