Question

formula for cos 2thita​

Answer 1

Answer:

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The formulas of Cos(2x) are as follows:

Cos²x - Sin²x.

1 - 2Sin²x.

2Cos²x - 1.

(1 - Tan²x) ÷ (1 + Tan²x)

Answer 2

Q]formula for cos 2thita

ANS ]

↪Cos2Thita =Cos ^2Thita-Sin^2. thita

↪Cos2 Thita =2Cos^2Thita-1

↪Cos2Thita= 1- 2 Sin^2Thita

↪Cos2Thita = 1-Tan^2Thita/1+Tan^2 Thita

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