Question

question 21solve and send image

Answer 1

$(1 + \cos( \alpha ) - \sin( \alpha ) ) \div ( \cos( \alpha ) - 1 + \sin( \alpha ) )$
multiply and divide by sin @

we get ,

(1/sin@)(sin @ + sin@ cos @ - sin ²@ /cos @ - 1 + sin @ )
=> (1/sin @)(sin@( 1+ cos@) - (1 + cos @)(1 - cos @)/cos @ - 1 + sin @ )
=> (1/sin @)( (1 + cos @)(cos @ - 1 + sin @ )/(cos @ - 1 + sin @ )
=> (1/sin @)(1 + cos @)
=> cosec @ + cot @
=> HENCE PROVED




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Answer 2

Answer:

ik

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ok

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