1) 1 + sinx = cosx where -180 < x < 180 (Provide the general and particular solutions)

2) Prove

(cosx/2 - sinx/2)^2 = 1 - sinx

3) Prove

sin2A = 1 - 2sin^2 (45 - A)

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- Nov 26th 2012, 03:16 PMportageNeed help with solving trig equations and trig identities
1) 1 + sinx = cosx where -180 < x < 180 (Provide the general and particular solutions)

2) Prove

(cosx/2 - sinx/2)^2 = 1 - sinx

3) Prove

sin2A = 1 - 2sin^2 (45 - A) - Nov 26th 2012, 03:55 PMcoolgeRe: Need help with solving trig equations and trig identities
2. expand and use cos^2+sin^2 = 1. Use sin2x = 2sinxcosx identity.

- Nov 26th 2012, 03:57 PMskeeterRe: Need help with solving trig equations and trig identities