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Step-by-step explanation:
1. firstly convert the trignometric gp into their alternative ones
2. through this you can achieve your answer
3. by using the formula ( 90- thitha)
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Step-by-step explanation:
=sin(90-20)÷sin70+cos theta÷cos. theta(because sin(90-theta)=cos theta)
=sin70÷sin70+cos theta ÷cos theta
=1+1
=2(proved)
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