 Ask Remember Me? brikelly08 Posts: 1, Reputation: 1 New Member #1 Jun 16, 2009, 07:31 PM
Trig proofs
Trig proofs
how do you solve:

tanx + cotx = secxcscx Perito Posts: 3,139, Reputation: 150 Ultra Member #2 Jun 16, 2009, 07:57 PM

Useful identities (memorize them)

(1)

(2)

(3)

(4)

(5)

Take the left hand side and find the common denominator. Use identity #5, above, and you'll find that the two sides are equal, which is what you want to prove.

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