pls help with this trig: find value of pi in sin pi=cos(pi +

[sonia]

i was given this question and i really do not know how to solve them. your kind input here will be highly appreciated.


question: find the value of pi in the following;

sin pi=cos(pi + 40)

sin(80 - pi)


thank you once again as i look forward to hearing from you guys.

 

[tkhunny]

Re: pls help with this trig

pi is always the same value. One does not need to find it's value.

Okay, let's assume pi is some angle. However, to avoid confusion, let's use theta, instead.

We are tasked with \(\displaystyle \sin(\theta) = \cos(\theta + 40\;deg)\)

Expand the cosine side and give it a go.

 

[mmm4444bot]

sin pi=cos(pi + 40)

sin(80 - pi)

From where do these exercises come? :shock:

 

[tkhunny]

Re: pls help with this trig

Maybe there shoudl be a fraction in there, somewhere.