Question

eliminate a for
x=tan a+cot a
y=tan a-cot a​

Answer 1

Answer:

Step-by-step explanation:

x=tan a +cot a

x²=tan²a+cot²a+2tan a×cot a

x²=tan²a+cot²a+2

x²-2=tan²a+cot²a

y=tan a-cot a

squaring

y²=tan²a+cot²a-2 tan a cota

y²=tan²a+cot²a-2

y²+2=tan²a+cot²a

equating

x²-2=y²+2

or x²-y²=4