cosec²72-tan²18°=1 full solutions
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cosec squared 72 minus 10 square 18 is equal to 1
{cosec(90-72)}²-tan²18=1
{sec 18}²-tan² 18=1
sec² 18- tan² 18=1
proved
since sec² a - tan² a=1
{cosec(90-72)}²-tan²18=1
{sec 18}²-tan² 18=1
sec² 18- tan² 18=1
proved
since sec² a - tan² a=1
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Cosec²72 - tan²18
=Cosec²72 - tan²( 90 - 72)
=Cosec²72 - Cot²72
=1
Please mark brainliest
=Cosec²72 - tan²( 90 - 72)
=Cosec²72 - Cot²72
=1
Please mark brainliest
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