Posted by **Anonymous** on Saturday, March 10, 2007 at 11:05am.

On a piece of paper draw and label a right triangle using the given sides, solve for the unknown side and write the trigonometric functions for angles A and B, if a=5 and c=7.

I already found side b which equals 2 sqrts of 6.

Now I need to find the sin/cos of B

SinB

a)5/7

b)7/2sqrt6

c)2sqrt6/7

d)7/5

Cos B

a)7/5

b)2sqrt6

c)7/2sqrt6

d)5/7

If someone can tell me what values to put for sine and cosine I can do the rest. Thanks!

An easy way to remeber these rules is SOHCAHTOA. S is sine C is cosine and T is tangent. The other letters tell you what to use to find them. O is opposite A is adjacent and H is hypotoneuse. So the sine of B would be 2 sqrts of 6 (opposite) over 7(hypot.)

then to find cosine you would use 5(adjacent) over 7(hypot.)

would this still be the answer even though they were the same answers for angle A?

sin A = side opposite/hypotenuse = 5/7

sin B = side opposite/hypotenuse = 2(sqrt 6)/7

sin B and cos B will give the same answer for angle B. You can subtract angle B from 90o to obtain angle A or use sin A = a/c = 5/7

Angle A is angle A is angle A. =).

It matters little if you use sin, cos, tan, cot, or whatever, you will always get the same answers for angles A, B, and C as long as the sides don't change length.

I get the part you are saying but could you or someone help me with how to plug it in to a calculator and solve it? It'd help a bunch

## Answer This Question

## Related Questions

- Math sin/cos - On a piece of paper draw and label a right triangle using the ...
- Inverse trigonometric function - How to solve without calculator 1. sin(arctan(...
- Math - Yesterday I learned to solve a right triangle assuming I know the 3 ...
- math - trig - Suppose ABC is a right triangle with sides of lengths a, b, and c ...
- Trigonometry - There is an arbitrary triangle with angles A, B, and C and sides ...
- Trigonometry - I need help with I just can't seem to get anywhere. this is as ...
- Evaluation-repost - Reposting because it has gone down to the second page! ...
- Geometry - x ________________<20* |<90* y | |<70* (hypotenuse length ...
- Trigonometry - using csc = 3.75, solve for sides: a= 3 b= ? c= ? and the ...
- math - Can anyone help w/ these. 1) Solve the equation in the internal [0deg, ...

More Related Questions