4. If x² (cos ec245º - cos 90°) - 5(cos 0° + tan 0°)x + sec? 45° = 0 show that x=2,1/2
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Answer:
89854924656164395348246524
Step-by-step explanation:
542454364543812454221924548249348480400500505040500561=349458101284542055.48484345is the answer
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