Question

if sectita+tantita=4, then find the costita​

Answer 1

Step-by-step explanation:

secθ + tanθ ⟹ 4

find, value of cosθ = ?

⟹ 1+sinθ/ cosθ = 4 ⟹ sinθ = 4cos θ - 1

Squaring on both the sides,

therefore,

sin² θ = 16 cos²θ - 8 cosθ + 1

⟹1−cos² θ=16cos²θ−8cosθ+1

⟹17cos²θ−8cosθ=0

⟹cosθ=8/17.

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