Question

express cos theta in terms of tan theta​

Answer 1

Answer:

The cosine of double angle is equal to the quotient of the subtraction of square of tangent from one by the sum of one and square of tan function. It is called the cosine of double angle identity in terms of tangent function.

Answer 2

Answer:

Step-by-step explanation:

cos θ = 1 / sec θ = 1 / √( 1 + tan²θ )