Proving identities. Please help.
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sin * sin/cos + cos = 1/(cos)
1. multiply cos by cos/cos and multiply.
sin * sin/cos +cos = 1/cos
(sin^2)/cos + (cos^2)/cos = 1/cos
(sin^2 + cos^2) / cos = 1/cos sin^2 + cos^2 = 1, so
1/cos = 1/cos
cheers :D
1. multiply cos by cos/cos and multiply.
sin * sin/cos +cos = 1/cos
(sin^2)/cos + (cos^2)/cos = 1/cos
(sin^2 + cos^2) / cos = 1/cos sin^2 + cos^2 = 1, so
1/cos = 1/cos
cheers :D