Math, asked by siddharthsingh8702, 1 year ago

(tan20/tan70)+(tan40/tan50)

Answers

Answered by mysticd

4

Solution :

(tan20/tan70)+(tan40/tan50)

=tan20cot70+tan40cot50

= tan20cot(90-20)

+ tan40cot(90-40)

= tan20tan20 + tan40tan40

= tan²20 + tan²40

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