given-the-regular-pyramid-T-ABCD-with-a-square-base-length-AB-8-TC-6-point-P-is-mid-BC-if-x-is-the-angle-between-TP-and-BD-determine-the-value-of-cos-x-

Question Number 78330 by john santu last updated on 16/Jan/20

g i v e n t h e r e g u l a r p y r a m i d

T . A B C D w i t h a s q u a r e b a s e

. l e n g t h A B = 8, T C = 6 . p o i n t

P i s m i d B C . i f x i s t h e a n g l e

b e t w e e n T P a n d B D . d e t e r m i n e

t h e v a l u e o f \cos x .