Provethat.
Tan15+cot15=4
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= tan 15+cot15
= sin 15 / cos 15 + cos 15 / sin 15
= (sin^2 15 + cos ^2 15) / (sin 15 cos 15)
= 1/(1/2 sin 30)
= 2 / sin 30
= 2 / (1/2)
= 4
Hence Proved
= sin 15 / cos 15 + cos 15 / sin 15
= (sin^2 15 + cos ^2 15) / (sin 15 cos 15)
= 1/(1/2 sin 30)
= 2 / sin 30
= 2 / (1/2)
= 4
Hence Proved
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