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since
x=asin@,
then
a/x=1/sin@,
a/x=cosec@,
then
a²/x² = cosec²@,
also
y=btan@,
then
b/y=1/tan@,
b/y=cot@,
then
b²/y² = cot²@,
therefore
a²/x² - b²/y²,
cosec²@ - cot²@,
1 (since cosec²@-cot²@=1)
x=asin@,
then
a/x=1/sin@,
a/x=cosec@,
then
a²/x² = cosec²@,
also
y=btan@,
then
b/y=1/tan@,
b/y=cot@,
then
b²/y² = cot²@,
therefore
a²/x² - b²/y²,
cosec²@ - cot²@,
1 (since cosec²@-cot²@=1)
i had
thank u
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