Please s explain the below expression cos¢=9/15, Tan¢=?.
Yashwath , 8 Years ago
Grade 7
Trigonometry> Please s explain the below expression cos...
1 AnswersHari Sundar Pyda
cos C=9/15We know that sin2C+ cos2C= 1.Sin2C= 1-cos2CSin2C= 1-(9/15)^2Sin2C= 1- 81/225Sin2C= 225-81/225Sin2C= 144/225SinC= 12/15TanC= sinC/cosC= 12/15 / 9/15TanC= 12/15*15/9TanC= 4/3.
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