Lines PQ and RS are parallel. It is given that ∠RSP=52∘, then find ∠SPQ.
Lines PQ and RS are parallel. It is given that ∠ RSP = 52∘, then find ∠ SPQ.
Show that
(I) tan 48° tan 23° tan 42° tan 67° = 1
(II)cos 38° cos 52° − sin 38° sin 52° = 0