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**norcal1.8t** I'm having trouble with some trig hwk problems, these are the specific ones. If anyone can help me i would appreciate it. Btw, this is my first post on here, heard about the forum from a friend, hopefully people can help me a lot on here! I need all the extra help i can get! Thanks!

3) If sinA=-5/13 with A in QIII, find the exact value of:

a) cos A/2(half-angle formula) b) sin2A(Double-Angle formula)

7) Find all RADIAN solutions. Give your anwers as EXACT values.

2cos²x-5sinx-4=0

8) Find all solutions Θ for __0°≤Θ<360°__ NOT 0°≤Θ≤360°.

√3sinΘ+cosΘ=1