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Prove sinx/cscx + cosx/secx = 1

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i don't understand how to solve identities in pre calc.

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solving-trigonometric-equations

asked Feb 24, 2014 in TRIGONOMETRY by linda Scholar

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1 Answer

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Remember the formula

Sin^2x+Cos^2x = 1

Sinx = 1/Cosx and Cosx = 1/Secx

Left handside identity = Siinx/Cscx + Cosx/Secx

= Sinx(Sinx)+Cosx(Cosx)

= Sin^2x+Cos^2x

= 1

= Right hand side identity

answered Feb 24, 2014 by david Expert

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