Explain the last 2 steps
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Step-by-step explanation:
3cosx + 5(√3/2 sinx - 1/2cosx)
3cosx +5√3/2sinx - 5/2cosx
(3cosx - 5/2cosx) + 5√3/2sinx
[3 - 5/2]cosx + 5√3/2sinx
1/2cosx +5√3)2sinx
√[{1/2cosx}^2]+ √[{5√3/2sinx}^2]
√[1/4 + 75/4]
√76/4
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