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प्रश्न
Evaluate the following :
`tan 35^@/cot 55^@ + cot 78^@/tan 12^@ -1`
उत्तर
We have to find:
`tan 35^@/cot 55^@ + cot 78^@/tan 12^@ -1`
since `tan (90^@ - theta) = cot theta` and `cot (90^@ - theta) = tan theta`
= 1
So value of `(tan 35^@)/(cot 55^@) + (cot 78^@)/(tan 12^@)` is 1
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