chapter of trigonometry no 18
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hope it's helpful to u...☺☺
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Raaz1111:
it is right but it's the answer of 19 not 18
it's OK
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Theta is written as @
Tan@+cot@=5
Square on both sides,
(Tan@+cot@) ²=5²
Tan²@+cot²@+2tan@*1/tan@ =25
( as cot =1/tan)
Tan²@+cot@+2=25
Tan²@+cot²@=25-2
Tan²+cot²=23
Tan@+cot@=5
Square on both sides,
(Tan@+cot@) ²=5²
Tan²@+cot²@+2tan@*1/tan@ =25
( as cot =1/tan)
Tan²@+cot@+2=25
Tan²@+cot²@=25-2
Tan²+cot²=23
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