Is it cos(2x) or cos2x?Helly123 said:
it's cos2xcnh1995 said:
Of courseHelly123 said:
! thank you. But there's one more answers but I don't know how to find itcnh1995 said:Of course
I hadn't read your complete solution.
But I think you've found all the possible values for x.
I see, I get it. thanksBvU said:
What about 300°?Helly123 said:
Yes, that's the answerehild said:
I see.. I didn't realize itChestermiller said:
Helly123 said:
To prevent such confusion, use parentheses -- i.e., write cos(2x) instead of cos2x. Also, we get a lot of students who are new to writing math expressions as text. I've seen many who write cos2x when they really mean cos2(x). For exponents, the ^ symbol is often used.cnh1995 said:
Ok I'll be more carefulMark44 said:
To identify the type of trigonometric equation, first look for any trigonometric functions (sine, cosine, tangent, etc.) and constants (numbers) in the equation. Then, determine if the equation is linear (only one trigonometric function), quadratic (trigonometric function raised to the power of 2), or a combination of trigonometric functions.
The steps to solve a linear trigonometric equation are:
To solve a quadratic trigonometric equation, follow these steps:
Some common trigonometric identities used to solve equations include:
If an equation has multiple trigonometric functions, use trigonometric identities to rewrite the equation in terms of one trigonometric function. Then, follow the steps for solving a linear or quadratic trigonometric equation. It may also be helpful to draw a unit circle or use a trigonometric table to solve for the variables.