sec² θ (1 + sin θ) (1 - sinθ ) = k
sec² θ(1-sin²θ ) = k
sec² θ cos² θ = k
sec² θ. 1 /sec²θ = k
1 = k
.. k = 1.
2/8 and 4/16 are equivalent to 1/4
Answer:
74°
Step-by-step explanation:
Let ½(theta) = X
Tan(X) = opposite/adjacent
= 7.5/10
X = (tan^-1)(0.75)
X = 36.8698976458
Theta = 2X = 2(36.8698976458)
Theta = 73.7397952916
Nearest degree: 74°