CBSE 10th Maths Last Year's Paper Trigonometry 3

16 views · Published 19 August 2017 · 4:09 · Indexed 4 October 2026

Channel: Dilip Thakur · 2017 · Education

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cos⁡9x=  sin⁡x,where then find the value of tan⁡5x
This can be solved by using the identity sin 90 -x = cos x
Then the angles of both the sides are to be equated to get the value 
x=9 . 
Putting this value in tan 5x we get tan 45= 1

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