Eliminate a forx=tan a+cot ay=tan a-cot a
1 answer:
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
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