Register
Why is cos(150⁰) not the same as cos(30⁰)? Is this because of the sign values of the cos. trig function that makes it negative in the 2nd quadrant?
145k views
3 votes
Why is cos(150⁰) not the same as cos(30⁰)?

Is this because of the sign values of the cos. trig function that makes it negative in the 2nd quadrant?

User Raynaldo
by
8.6k points

1 Answer

3 votes
Yeah, cos 150° is negative because it's in the 2nd quadrant, which has all negative x-values. (The third quadrant has all negative x-values as well)
Cos 30° is positive because the first quadrant(and 4th) have all positive x-values.
User DaveU
by
8.2k points
← Prev Question Next Question →

Related questions

User Vbezhenar
asked Nov 4, 2024 19.6k views
Practice 2a: Find tangent of 150⁰.
Vbezhenar asked Nov 4, 2024
by Vbezhenar
7.6k points
1 answer
0 votes
19.6k views
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Other Questions

What is .725 as a fraction
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement  how thick must the cement be to cover field
A dealer sells a certain type of chair and a table for $40. He also sells the same sort of table and a desk for $83 or a chair and a desk for $77. Find the price of a chair, table, and of a desk.
The cost of 5 similar digital cameras and 3 similar video cameras is 3213. Each video camera costs 4 times as much as each digital camera. John buys a digital camera and a video camera. How much does he
Link Copied!