SecФ=2 is the same as cosФ=1/2 because sec and cos are inverse functions.
So when solving cosФ=1/2, you need the find the angles where the cos graph equals 1/2. Generally you're supposed to memorize some angle values for your trig functions and this is one of them. The cosine graph is equal to 1/2 when Ф=60° or pi/3 in radians. The answer is also 300° or 5pi/3 radians because cosine is also positive in the fourth quadrant.
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Answer:
(5,-2)
Step-by-step explanation:
I hope this helps :)
Answer:
An equation is ![x+52\°+90\°=180\°](https://tex.z-dn.net/?f=x%2B52%5C%C2%B0%2B90%5C%C2%B0%3D180%5C%C2%B0)
Step-by-step explanation:
Let
be the measure of the unknown acute angle.
According to angle sum property of a triangle, sum of all the angles of a triangle is equal to 180°.
One of the acute angles of a right triangle is equal to 52°.
Also, the triangle is a right angled triangle, one of the angle must be equal to 90°.
![x+52\°+90\°=180\°\\x+142\°=180\°\\x=38\°](https://tex.z-dn.net/?f=x%2B52%5C%C2%B0%2B90%5C%C2%B0%3D180%5C%C2%B0%5C%5Cx%2B142%5C%C2%B0%3D180%5C%C2%B0%5C%5Cx%3D38%5C%C2%B0)
So, an equation is ![x+52\°+90\°=180\°](https://tex.z-dn.net/?f=x%2B52%5C%C2%B0%2B90%5C%C2%B0%3D180%5C%C2%B0)
The answer would be B. 3x^2-2-(2x+4). Combine like terms.