Question

if tan Thita =2 find the valu of cos thita

​

Answer 1

Answer:

cos ( thita) = 1/√5

Step-by-step explanation:

tan ( thita) =2

=> tan^2 (thita) = 4

=> 1+ tan^2 (thita) = 1+4

=> sec^2 (thita) = 5

=> sec (thita) = √5

then,

cos (thita) = 1/sec (thita) = 1/√5