×

# Trigonometry Help

This discussion has been deleted!

Note by Dan Ley
1 month, 1 week ago

Sort by:

Is d equal to a^2-b^2 @Dan Ley · 1 month, 1 week ago

I think you can do it by expanding the bottom, and multiplying the top out by $$d+acosc$$, and showing that these two expressions are equal. But I can't see a better, nice method. · 1 month, 1 week ago

I agree let me work on it I will get back to you after 2-3 days I am a little busy Board exams are coming up · 1 month, 1 week ago

That's fine don't stress over it, it's just part of my school project:) Good luck with the exams bro. · 1 month, 1 week ago

Thanks But I will try · 1 month, 1 week ago

No, $$d^2=a^2-b^2$$, so $$d=\sqrt{a^2-b^2}$$. · 1 month, 1 week ago

Ok · 1 month, 1 week ago

@Neel Khare don't worry about it, I just multiplied the equation out so that there were no fractions, and replaced $$\sin^2c$$ with $$1-\cos^2c$$. Then you can show that the two expressions are equal, but it's not fun or elegant or particularly difficult... · 1 month ago

Comment deleted 2 weeks ago