Question

prove that (1)tan10 , tan 40 , tan 60, tan 80 , tan 90 = root 3
(2)if tan theta =3/4 find the value of sin theta and Cos theta ​

Answer 1

Step-by-step explanation:

Tan 10 * tan 20 * tan30 * tan40 * tan 50 * tan 60 * tan70 * tan80

tan 10 * tan 20 * tan30 * tan 40 * tan(90-40) * tan (90-30) * tan (90-20)* tan (90-10)

tan 10 * tan 20 * tan 30 * tan 40 * cot 40 * cot 30* cot 20 * cot 10

Hence all canceks out and

Answer is 1.

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